1. Which of the following is not an ore of Aluminium?
(A) Felsper
(B) Bauxite
(C) Cryolite
(D) Azurite

2. Most soluble in water is —
(A) Camphor
(B) Sugar
(C) Sulphur
(D) Common Salt

3. Bromine is —
(A) colourless gas insoluble in water
(B) A highly inflammable gas
(C) A Black solid.
(D) A red liquid.

4. The metal used in storage batteries —
(A) Iron
(B) Copper
(C) Lead
(D) Zinc

5. Water has maximum density at —
(A) –4°C
(B) 0°C
(C) 4°C
(D) 100°C

6. The chemial name of Uria is —
(A) Aneurin
(B) Chloroetane
(C) Carbamide
(D) None of these

7. Permanent hardness of water can be removed by adding —
(A) Potassium Permanganate
(B) Chlorine
(C) Bleaching Powder
(D) Washing Soda

8. The formula of Plaster of Paris is —
(A) CaSO4
(B) CaSO4, 2H2O
(C) 2CaSO4, 4H2O
(D) 2CaSO4, H2O

9. Which of the following substance is a bad conductor of electricity but a good conductor of heat?
(A) Asbestos
(B) Celluloid
(C) Purspecks
(D) Mica

10. Carborandum is —
(A) Silicon Dioxide
(B) Silicon Carbide
(C) Silicon Nitride
(D) Silicon Phosphide

11. Which of the following is the best conductor of electricity ?
(A) Copper
(B) Mica
(C) Zinc
(D) Silver

12. Washing soda is the common name of —
(A) Calcium Carbonate
(B) Calcium Bi-Carbonate
(C) Sodium Carbonate
(D) Sodium Bi-Carbonate

13. The filament of electric bulb is made of —
(A) Iron
(B) Nichrome
(C) Tungsten
(D) Graphite

14. Bleaching powder is made from —
(A) Sulphur dioxide and gypsum
(B) Chlorine and Charcoal
(C) Soda ash and lime
(D) Lime and Chlorine

15. The two elements that are frequently used for making transistors are —
(A) Boron and Aluminium
(B) Silicon and Germenium
(C) Iridium and Tungsten
(D) Niobium and Columbium

16. Which of the following gas is not known as green house gas ?
(A) Methane
(B) Carbon dioxide
(C) Nitrous oxide
(D) CFC

17. Which of the following is not a neutral oxide ?
(A) Carbon Monoxide
(B) Sulphur Dioxide
(C) Water
(D) Nitric Oxide

18. Which of the following is used in making smoke bombs ?
(A) Sulphur
(B) Phosphorus
(C) Hydrogen
(D) Carbon

19. Caustic Soda is —
(A) Nacl
(B) Na2CO3
(C) NaOH
(D) NaHCO3

20. Chemical formula of Water glass is —
(A) Na2SiO3
(B) Al2O3
(C) NaAlO2
(D) CaSiO3

21. Which of the following is not a bleaching agent?
(A) Sulpher di-oxide
(B) Carbon di-oxide
(C) Sodium hypochlorite
(D) Chlorine

22. The gas usually filled in electric bulb is —
(A) Hydrogen
(B) Oxygen
(C) Nitrogen
(D) Carbon di-oxide

23. Heavy water is —
(A) Tritium oxide
(B) Deuterium oxide
(C) Rain water
(D) Water at 4°C

24. The gases used in different types of welding would include —
(A) Oxygen & Hydrogen
(B) Oxygen, acetylene & argon
(C) Oxygen & acetylene
(D) Oxygen, hydrogen & nitrogen

25. Which of the following alloys is used for making magnets ?
(A) Duralumin
(B) Stainless Steel
(C) Alnico
(D) Magnelium

Answers:
1. (D) 2. (B) 3. (D) 4. (C) 5. (C) 6. (C) 7. (D) 8. (D) 9. (D) 10. (B) 11. (D) 12. (C)
13. (C) 14. (D) 15. (B) 16. (C) 17. (B) 18. (B) 19. (C) 20. (A) 21. (B) 22. (C) 23. (B) 24. (C) 25. (C)

i request all the members plz share question and answers those most important questions.
and write subject name.

1. Parmanent hardness of water may be removed by the addition of —
(A) Alum
(B) Sodium Carbonate
(C) Lime
(D) Potassium Permanganate

2. Potassium nitrate is used in —
(A) Salt
(B) Glass
(C) Fertiliser
(D) Medicine

3. In which type of rocks are metals like Gold and Copper mostly found ?
(A) Old igneous
(B) Old sedimentary
(C) Old metamorphic
(D) New metamorphic

4. Which of the following gases is lighter than air ?
(A) Carbon dioxide
(B) Oxygen
(C) Ammonia
(D) Chlorine

5. Which of the following is used as lubricant ?
(A) Graphite
(B) Silica
(C) Diamond
(D) Iron Oxide

6. The purest form of iron is —
(A) Steel
(B) Pig iron
(C) Cast iron
(D) Wrought iron

7. The percentage of carbon is the least in —
(A) Grey cast iron
(B) Wrought iron
(C) White cast iron
(D) Steel

8. The colour of Emerald is —
(A) Violet
(B) Yellow
(C) Deep Green
(D) Prussian Blue

9. Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of —
(A) Nitrates
(B) Zeolites
(C) Sulphonates
(D) None of these

10. Rust is —
(A) A mixture of Fe2O3 and Fe(OH)2
(B) A mixture of FeO and Fe(OH)2
(C) FeO only
(D) A mixture of Fe2O3, 3H2O and FeO

11. Liquefied Petroleum gas (LPG) consists of mainly —
(A) Methane, Ethane and Hexane
(B) Ethane, Hexane and Nonane
(C) Methane, Butane and Propane
(D) Methane, Hexane and Nonane

12. The metal that is present in Photo Films is —
(A) Mercury
(B) Platinium
(C) Magnesium
(D) Silver

13. Which of the following is in liquid form at room temperature ?
(A) Cerium
(B) Sodium
(C) Francium
(D) Lithium

14. Soda water contains —
(A) Nitrous acid
(B) Carbonic acid
(C) Carbon dioxide
(D) Sulphuric acid

15. Which of the following is basis of the modern periodic table ?
(A) Atomic mass
(B) Atomic number
(C) Atomic size
(D) Atomic volume

16. Of the following metals, which one pollutes the air of a big city ?
(A) Copper
(B) Cadmium
(C) Lead
(D) Chromium

17. Brass is an alloy of —
(A) Nickel and Copper
(B) Copper and Silver
(C) Nickel and Zinc
(D) Zinc and Copper

18. The element required for Solar energy conversion —
(A) Beryllium
(B) Silicon
(C) Tantalum
(D) Ultra pure carbon

19. Monazite is an ore of —
(A) Sodium
(B) Titanium
(C) Thorium
(D) Zirconium

20. Potassium Permanganate is used for purifying drinking water, because —
(A) It dissolves the impurities of water
(B) It is a sterilizing agent
(C) It is an oxidising agent
(D) It is a reducing agent.

21. The presence of which of the following salts in water causes corrosion in steam boilers ?
(A) Sodium Chloride
(B) Magnesium Chloride
(C) Calcium bicarbonate
(D) Potassium bicarbonate

22. Water is a good solvent of ionic salts because —
(A) It has no colour
(B) It has a boiling point
(C) It has a high dipole moment
(D) It has a high specific heat

23. The hardest substance available in earth is —
(A) Platinum
(B) Silicon
(C) Diamond
(D) Gold

24. Which of the following is the best conductor of electricity ?
(A) Zinc
(B) Copper
(C) Gold
(D) Silver

25. The ratio of pure gold in 18 carat gold is —
(A) 60%
(B) 75%
(C) 80%
(D) 100%

Answers:
1. (B) 2. (B) 3. (A) 4. (C) 5. (A) 6. (D) 7. (D) 8. (C) 9. (B) 10. (D) 11. (C) 12. (D)
13. (C) 14. (C) 15. (B) 16. (C) 17. (D) 18. (B) 19. (C) 20. (C) 21. (B) 22. (C) 23. (C) 24. (D) 25. (B)

Q151.Quaid e Azam is burried in.........
Ans. Karachi
Q152.Original name of Qalandar Shahbaz is..............
Ans. Usman ullah Marwandi
Q153.Sachal Sarmast ka Mela kis islami date ko hota hai........
Ans. 14 Ramdan
Q154. Date of birth of Shah Wali ullah is
Ans. 1114 hijri 21 feb 1703
Q155. Sri lanka k log zyada tar..........k Poojari hain.
Ans. Budhists.
Q156.Shah Latif ka Muqbara kis ne banaya?
Ans......
Q157Hazrat Ayoob Ansari ki mout kaise hoi?
Ans..........
Q158.Kis Surat ko Quran Pak ka dil kaha jata hai?
Ans. Suratul Yaseen
Q159.Kis Surat mein Bismillah do martba hai?
Ans. Suratul Namal
Q160.Kis Surat mein Bismillah nahin hai?
Ans.Surat Touba
Q161.Hazrat Muhammad PBUH ne jab pehli shaadi ki us waqat uski umar kitni thi?
Ans.25 Years.
Q162. Hazrat Sachal Sarmast Ka Roza kahan pe hai
Ans.Daraza Shareef District Khairpur
Q163. Shalamaar Bagh kis Shaher mein hai
Ans. Lahore
Q164.Ayubia Tafreeh gah kis province mein hai
Ans. Khyber Pakhtoonkhuwah
Q165.Pakistan aur...........ki Sarhad ek hai
Ans. Afghanistan
Q166. Who was the first Martial Law Administrator?
Ans. Gen Ayub Khan
Q167. Second World War of the World in
Ans. 1939
Q168. Lakhnow Agreement in........
Ans. 1916
Q169. Kis country ne Pehle Pakistan ko Azad riyasat Qubool kiya
Ans. Iran
Q170. RCD kab wujood mein aya.
Ans. 1965
Q171. Pakistan ka Sab se bara choti(peak K2) kahan hai
Ans. karakaram
Q172.Nehru report Kab pesh kya gaya.
Ans. 1928
Q173.Capital of Azad Kashmir is.....
Ans.Muzararabad
Q174.Jab Hazrat Muhammad PBUH pe wahi nazul hoi us waqt Ap Kareem SAW ki umar kia thi
Ans.40
Q175.Kalimullah kis nabi ko kaha jata hai?
Ans. Hazrat Moosa
Q176.Haathi walon ka zikr suatul.............mein hai
Ans. Suratul Feel
Q177.Holy Prophet PBUH................. Hijri koWafat kar gae.
Ans.11 Hijri
Q178. Madina ka puraana Naam..........
Ans. Yasrab
Q179. Sindh ka Qoumi poet kise kaha jata hai?
Ans. Shah Abdul Latif
Q180. Makli Qaburistan kis district mein hai?
Ans. Thatta
Q181. Jab Mohd Bin Qasim ne 712 Sindh fateh kia to us waqt kis ki hukumrani thi?
Ans. Raja Daher
Q182. Hosh Mohd kis sal mein angrezon se lara?
Ans. 1843
Q183. Makhdoom Bilawal Arghoonok k hatho.............. m mara gaya
Ans. 17 jan 1523
Q184. Sindh Madrasatul Islam ka baani...............tha
Ans. Hassan Ali Afandi
Q185. Shamasul Ulma......................ka laqab tha
Ans. Allama Doud pota
Q186. National Security Council ka chief...............hai
Ans. Sadar e Pakistan
Q187. Pakistan ki pehli khatoon Prime Minister..............
Ans. Shaheed Benazir Bhutto

SAMPLE PAPER
JUNIOR CLERK



ENGLISH

Complete the sentences by choosing the most appropriate word, from the given lettered choices (A to D) below each.

I am sick ________ life.

on
in
from
of

Choose the lettered word or phrase that is most nearly opposite in meaning to the word in capital letters.

HIGH:

lofty
towering
elevated
base

Choose the word most similar in meaning to the capitalized ones.

CHANGE:

alter
church
complete
decide
agree

Read the passage to answer the question 4-5

It is important that we should develop an attitude of objective and clear thinking in the study of science. It will open and enlarge our minds which are the very soul of science. Experiments and research work have brought about great advancement in science. Therefore, we must realize that science is a creative activity.

Objective and clear thinking make the study of science:

Easier
Difficult
Fruitful
Enjoyable

Experiments and research work are:

Different
Related
Unrelated
Opposite

ANALYTICAL REASONING

Questions 6-8

A baker must bake exactly five bakery items in his bakery. The bakery items must be baked consecutively, the baking of one being completed before the baking of the next begins. The five bakery items to be baked are Apple Pie, Bread, Cookies, Donuts and Egg Pastries.

Cookies must be baked before Egg Pastries.
Bread must be baked immediately after Apple Pie.
Donuts must not be baked first.

Which of the following is an acceptable order for the baking of the five bakery items?

Donuts, Cookies, Egg Pastries, Apple Pie, Bread
Apple Pie, Donuts, Egg Pastries, Bread, Cookies
Bread, Cookies, Apple Pie, Donuts, Egg Pastries
Apple Pie, Bread, Egg Pastries, Donuts, Cookies
Cookies, Donuts, Apple Pie, Bread, Egg Pastries

If Cookies are the fourth item baked, which of the following must be false?

Cookies are baked immediately after Bread.
Apple Pie is the first item baked.
Donuts are baked immediately after Bread.
Exactly one bakery item is baked between Donuts and Egg Pastries.
Egg Pastries are the last item baked.

If Donuts are the second item baked, Apple Pie must be which of the following?

the first or the third item baked
the first or the fourth item baked
the third or the fifth item baked
the fourth or the fifth item baked
the third or the fourth item baked

Although air pollution was previously thought to exist almost exclusively in our nation's cities, the recent increase in the number of persons suffering from illnesses attributed to excessive air pollution leaves us no choice but to conclude that ether, non-urban areas are now affected.

Which of the following, if true, would most serious*ly weaken the conclusion of the argument above?

The nation's cities have seen a marked decrease in their levels of air pollution.
The nation has experienced a sharp decrease in the number of people moving out of its cities.
Illnesses due to air pollution are among the least common causes of death to urban dwellers.
Many illnesses previously thought unrelated to air pollution are now considered to be caused by it.
As a result of the problems in urban areas, non-urban areas have passed strict pollution control measures

QUANTITATIVE

18 ÷ 0.04 =?

4.5
45
450
4,500
45,000

is closest to:

5
5.4
5.5
5.6
5.7

?

-4
52
-52
192
28

?

255,300
25,530
2,553
255.3
25.53
GENERAL KNOWLEDGE

Karachi is known as _________.

Broadway of Pakistan
City of Lights
Gateway of Pakistan
Heart of Pakistan

C.N.N. stands for________.

Cable Network of News
Cable News Network
Cyber News Network
Central News Network

The numbers of the suras in the Holy Quran are:

110
112
114
120
COMPUTER

What does the ‘undo’ option do in MS Word?

Repeat your last action
Change you text size
Insert an image
Delete the document

Which of the following are examples of functions in MS EXCEL?

Sum
Average
Max
Min
All of the above

What is meant by ALU?

Arranged Logic Unit
Arithmetic Logic Unit
Arithmetic Logarithmic Unit
None of the above




 Answer Keys



Q #. Right Choice
1 D
2 D
3 A
4 C
5 B
6 E
7 A
8 E
9 B
10 C
11 C
12 E
13 C
14 B
15 B
16 C
17 A
18 E
19 B

Q187. Pakistan ki pehli khatoon Prime Minister..............
Ans. Shaheed Benazir Bhutto
Q188.Pakistan Nuclear attack in ...............
Ans. 1998
Q189. Mohammad Ali Johar born in....................
Ans.Rampur
Q190. A leap year has....................days.
Ans. 366 days.
Q191. Indus Platue is in................
Ans.Pakistan
Q192.Karakaram Highway passes through.............
Ans.Karakaram range
Q193. Allama Iqbal was born in.............
Ans.Sialkot
Q194. Quaid e Azam ne bemari k waqt kis shaher m rest k liye rehaish ki thi?
Ans.Ziarat Balochistan
Q195.Where is Arabic Sea?
Ans.It is in the South of Pakistan
Q196.Nazir Sabir is a well known as............
Ans.Mountainer
Q197.Mangle Dam is built on..........
Ans.Jehlum River
Q198.Karakaram Himalya and Hindukash are located in..............
Ans.South Asia
Q199.Pakistan Share border with..........Countries
Ans.4 or 5 plz confirm it first.
Q200. ..................is the smallest planet of solar system
Ans. Mercury
Q201. Thar is located in...............province
Ans. Sindh
Q202.The word Muhammad (SAW) as a name has been mentioned in Quran only:
Ans.Four times
Q203. Khateeb –ul-Anbia as a title of:
Ans. Hazrat Shoaib (AS)
Q204 . A Verse of the Holy Quran indicates the name of:
Ans. Hazrat Zaid (RA)
Q205. Masjid Zu Qiblatain is situated in
Ans. Madina
Q206. Which Surah of Quran has Bismillah twice:
Ans. Al Namal
Q207. Sadaq-e-Eid-ul-fitr has been proclaimed in the year:
Ans. 2 Hijri
Q208. Imam-e-Dar-ul-Hijrat was a title of:
Ans. Imam Malik
Q209. Ameen –ul-Umat is the title of Hazrat:
Ans. Abu-ubaida bin Al jaraah (RA)
Q210. Arafat gathering is held on:
Ans. 9 Zil hajj
Q211. How much Surah the Quran contains:
Ans. 114
Q212- The Nisab of Zakat in gold is
Ans. 7 ½ Tolas
Q213. The original name of Imam Bukhari is:
Ans. Muhammad bin Ismail
Q214. Makka was conquered in:
Ans. 8 A.H
Q215. Jami-i-Quran is taken for:
Hazrat Usman (R.A)
Q216. Pious-Caliphate lasted for about:
Ans. Thirty Years

It's "nuclear tests" not "nuclear attack".
The word "nuclear" is very sensitive,so be careful while using it.


Stay blessed

actually it was typing mistake thanks for telling ........
Thanks Durani Sahib

1. Cow milk is a rich source of —
(A) Vitamin A
(B) Vitamin B1
(C) Vitamin C
(D) Vitamin D

2. The element found in the surface of the Moon is —
(A) Tin
(B) Tungsten
(C) Tantalum
(D) Titanium

3. The average salinity of sea water is —
(A) 2%
(B) 3%
(C) 2.5%
(D) 3.5%

4. Which of the following is the most stable element?
(A) Uranium
(B) Hydrogen
(C) Oxygen
(D) Lead

5. Find the odd one ?
(A) Marble
(B) Chalk
(C) Lime Stone
(D) Slaked Lime

6. Diamond is harder than graphite because of —
(A) Difference of layers of atoms
(B) Tetrahedral structure of diamonds
(C) Difference of crystaline structures
(D) None of these

7. A super conductor is characterised by —
(A) Zero permeability
(B) Low permeability
(C) High permeability
(D) Infinite permeability

8. Of the various forms of carbon, which one is used for absorption purpose ?
(A) Diamond
(B) Graphite
(C) Coke
(D) Wood Charcoal

9. The main constituents of Pearl are —
(A) Calcium Carbonate, Magnesium Carbonate
(B) Calcium oxide, Ammonium Chloride
(C) Argonite , Chonchiolin
(D) Ammonium Sulphate, Sodium Carbonate

10. An element that does not occur in nature but can be produced artificially is —
(A) Thorium
(B) Radium
(C) Plutonium
(D) Uranium

11. The inert gas which is substituted for nitrogen in the air, used by deep sea drivers for breathing is —
(A) Helium
(B) Argon
(C) Krypton
(D) Xenon

12. The group of metals Fe, Co, Ni may be best called as —
(A) Alkali metals
(B) Rare metals
(C) Main group metals
(D) Transition metals

13. Which of the following characters is not shown by hydrogen —
(A) It burns in air to form water
(B) It supports combustion
(C) It combines with almost all metals forming hydrides
(D) It readily combines with fluorine and chlorine

14. Which of the following elements is obtained from sea weeds ?
(A) Argon
(B) Sulphur
(C) Vanadium
(D) Iodine

15. The metallic constituents of hard water are —
(A) Magnesium, Calcium and tin
(B) Iron, tin and calcium
(C) Calcium, magnesium and iron
(D) Magnesium, tin and iron

16. The property of a substance to absorb moisture from the air on exposure is called —
(A) Osmosis
(B) Desiccation
(C) Efflorescence
(D) Deliquescene

17. Brass gets discoloured in air due to the presence of which gas in air —
(A) Carbon dioxide
(B) Oxygen
(C) Hydrogen Sulphide
(D) Nitrogen

18. Quartz crystals normally used in quartz clocks etc. is chemically —
(A) Sodium Silicate
(B) Silicon dioxide
(C) Germenium dioxide
(D) A mixture of (B) & (C)

19. Bell Metal is an alloy of —
(A) Brass and Nickel
(B) Zinc and Copper
(C) Tin and Copper
(D) Nickel and Copper

20. The high temperature superconductors are —
(A) Metal alloys
(B) Ceramic oxides
(C) Inorganic polymers
(D) Pure rare earth metals

21. The ingredients of Gun metal are —
(A) Iron, tin
(B) Copper, tin
(C) Iron, brass, tin
(D) Iron, zinc, titanium

22. The gas usually causing explosions in coal mines is —
(A) Hydrogen
(B) Carbon monoxide
(C) Air
(D) Methane

23. Cotton fibers are made of —
(A) cellulose
(B) starch
(C) proteins
(D) fats

24. Which of the following ores does not contain iron?
(A) Haematite
(B) Magnetite
(C) Limonite
(D) Cassiterite

25. Nuclear fission is caused by the impact of —
(A) Proton
(B) Electron
(C) Neutron
(D) (A) & (b)

Answers:
1. (B) 2. (D) 3. (D) 4. (D) 5. (D)6. (C) 7. (A) 8. (D) 9. (A) 10. (C) 11. (A) 12. (D)
13. (B) 14. (D) 15. (C) 16. (D) 17. (C) 18. (B) 19. (C) 20. (B) 21. (B) 22. (D) 23. (A) 24. (D) 25. (C)

1. The first synthetic fibre made by man was —
(A) Rayon
(B) Nylon
(C) Polyester
(D) Terycott

2. Which variety of glass is heat resistant ?
(A) Hard glass
(B) Flint glass
(C) Pyrex glass
(D) Bottle glass

3. Which of the following is used for removing air bubbles from glass during its manufacture ?
(A) Fledspar
(B) Arsenic oxide
(C) Potassium Carbonate
(D) Soda Ash

4. What are soaps ?
(A) Salts of silicates
(B) Ester of heavy fatty acids
(C) Sodium or potassium salts of heavier fatty acids
(D) Mixture of glycerol and alcohol

5. Which of the following is used in making artificial sweetener saccharine ?
(A) Benzene
(B) Toluene
(C) Phenol
(D) Aniline

6. Rayon is chemically —
(A) Glucose
(B) Amylase
(C) Cellulose
(D) Peptin

7. Which of following is used as a filter in rubber tyres?
(A) Graphite
(B) Coal
(C) Coke
(D) Carbon Black

8. In vulcanization, natural rubber is heated with —
(A) Carbon
(B) Sulphur
(C) Silicon
(D) Phosphorus

9. Which type of fire extinguisher is used for petroleum fire ?
(A) Foam type
(B) Soda acid type
(C) Powder type
(D) None of these

10. Which is/ are the important raw materials in cement industry ?
(A) Limestone
(B) Gypsum & Clay
(C) Clay
(D) Limestone & Clay

11. Which of the following is the petroleum wax ?
(A) Bees wax
(B) Carnauba wax
(C) Paraffin wax
(D) Jojoba wax

12. Which of the following fibres is generally preferred for making gauze and lint ?
(A) Cotton
(B) Rayon
(C) Nylon
(D) Terylene

13. Rubber is coagulated from latex by adding —
(A) Hydrochloric acid
(B) Acetic acid
(C) Sulphuric acid
(D) Carbonic acid

14. Paper is manufactured by —
(A) Wood and resin
(B) Wood, Sodium and Bleaching powder
(C) Wood and bleaching powder
(D) Wood, Calcium, hydrogen sulphate and resin

15. Which synthetic fibre is known as artificial silk ?
(A) Cotton
(B) Rayon
(C) Terylene
(D) Nylon

16. Deep blue colour is imparted to glass by the presence of —
(A) Iron oxide
(B) Cupric oxide
(C) Nickel oxide
(D) Cobalt oxide

17. The combustible material at the tip of a safety match stick is —
(A) Sulphur
(B) Manganese dioxide
(C) Phosphorus
(D) Antimony sulphide

18. Which of the following roofs provide better protection against fire ?
(A) Cement slab
(B) Asbestos sheet
(C) Reinforced concrete
(D) None of these

19. The material used for bleaching paper pulp is —
(A) Chlorine
(B) Caustic soda
(C) Sodium Hypochlorite
(D) Lime

20. Which of the following is a protein ?
(A) Wool
(B) Starch
(C) Natural rubber
(D) Cellulose

21. Soap is a mixture of sodium or potassium salts of—
(A) Monocarboxylic acid
(B) Glycerols
(C) Dicarboxylic acid
(D) Tricarboxylic acid

22. Which of the following material is used to prepare blue-black ink ?
(A) Gallic acid
(B) Tannic acid
(C) Ferrous sulphate
(D) All of these

23. The type of glass used in making prisms and lenses is —
(A) Soft glass
(B) Pyrex glass
(C) Jena glass
(D) Flint glass

24. Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous glass called —
(A) Carbon Monoxide
(B) Phosphine
(C) Phosgene
(D) None of these

25. Which of the following is commonly called a polyamide ?
(A) Rayon
(B) Orion
(C) Terylene
(D) Nylon

Answers:
1. (B) 2. (C) 3. (B) 4. (C) 5. (B) 6. (C) 7. (D) 8. (B) 9. (C) 10. (D) 11. (C) 12. (B)
13. (B) 14. (D) 15. (B) 16. (D) 17. (D) 18. (B) 19. (C) 20. (C) 21. (A) 22. (D) 23. (D) 24. (D) 25. (D)