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4

When ants bite, they inject

A. glacial acetic acid

B. methanol

C. formic acid

D. stearic acid

Correct Answer :

C. formic acid


Related Questions

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4

The flux added in the blast furnace is

A. Limestone

B. FeO

C. SiO2

D. MgO

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4

Penicillin was discovered by

A. Alexander Fleming

B. Sir JJ Thomson

C. Dr Nessler

D. Sir John Russel

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4

Dry Ice is

A. solid carbon dioxide

B. liquid oxygen

C. liquid hydrogen

D. liquid. Chlorine

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4

The pure at form of iron is

A. wrought iron

B. steel

C. pig iron

D. nickel steel

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4

The fertilizer which has the largest percentage of nitrogen is

A. urea

B. ammonium nitrate

C. ammonium sulphate

D. calcium cyanamide

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Which one of the following is used for dry cleaning?

A. Kerosene oil

B. Diesel oil

C. Lubricating oil

D. Petroleum ether

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4

Rayon la made from

A. cotton

B. wool

C. cellulose

D. silk

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Water has an unusually high bolling point because

A. its molecular weight is low

B. it is denser than ice

C. it is a good solvent for many ionic substances

D. the molecules of water are joined by hydrogen bonds

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4

The hormone which absorption is increases glucose oxidation and glucose

A. adrenalin

B. thyroxin

C. insulin

D. epinephrine

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Triple Antigen treatment for children is to ward off

A. whooping cough

B. tetanus

C. diphtheria

D. All the three

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4

In addition to nitric acid, another acid which may render iron passive is

A. acetic acid

B. oxalic acid

C. chromic acid

D. citric acid

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4

Which of the following types of water gives lather easily with soap?

A. Hard water

B. Heavy water

C. Soft water

D. Both (a) and (b)

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4

Plaster of Paris

A. contracts while setting

B. expands while setting

C. is highly volatile

D. does not suffer any changes in volume while setting

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4

Nitrous oxide used as anaesthetic is usually mixed with

A. ethyl alcohol

B. chloroform

C. oxygen

D. methyl alcohol

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4

The science which deals with the chemistry of life processes is known as

A. electrochemistry

B. physical chemistry

C. biochemistry

D. tinctorial chemistry

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4

Quick lime has the formula

A. CaO

B. Ca(OH)2

C. NaOH

D. Na2CO3

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4

The percentage of silver in German silver is

A. ten

B. twenty

C. zero

D. fifty

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4

The Combined Gas Law equation is

A. P1V1T1 = P2 V2 T2

B. P1V1T2 = P2V2T1

C. P = P1 + P2 + P3

D. C =

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4

Which of the following cannot be used as fuel?

A. Gasoline

B. Kerosene

C. Sulphuric acid

D. Alcohol

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Oil of winter green contains

A. acetone

B. ether

C. acetic acid

D. methyl salicylate

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4

The term 'nucleons' apples to

A. neutrons

B. protons

C. protons and neutrons

D. protons and electrons

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The non-metal which is electropositive is

A. chlorine

B. nitrogen

C. sulphur

D. hydrogen

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The carbon cycle ensures that

A. the percentage of carbon dioxide in air is kept almost constant

B. air always contains a constant proportion of oxygen

C. sufficient amounts of carbohydrates are produced

D. the process of photosynthesis proceeds smoothly

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4

Jeweller's rouge is

A. magnetic oxide of iron

B. ferric oxide

C. ferrous oxide

D. ferrous carbonate

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4

Which of the following is not a characteristic of potable water?

A. It must be free from suspended impurities

B. It must be free from harmful bacteria

C. It must contain traces of sodium bicarbonate

D. It must have a fishy odour

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4

Which or the following is not a constituent or gun powder?

A. Ammonium nitrate

B. Nitre

C. Charcoal powder

D. Sulphur

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4

The best specimen for drinking purposes is

A. rain water

B. river water

C. conductivity water

D. deep well water

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4

The number of neutrons in the nucleus of an atom of mass A and atomic number Z is given by

A. A - Z

B. A + Z

C. Z

D. A

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4

Galvanising is coating Iron with

A. nickel

B. zinc

C. chromium

D. copper

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Consider the following statements: Hard water is not suitable for
1) drinking
2) washing clothes with soap
3) use in boilers
4) irrigating crops
Which of these statements are correct?

A. 1 and 3

B. 2 and 3

C. 1, 2 and 4

D. 1, 2, 3 and 4