Home
Current Affairs January 2024

What is the correct answer?

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)

Correct Answer :

C. Soft water


Related Questions

What is the correct answer?

4

Solid carbon dioxide (Dry ice) is also known as

A. Thiokol

B. Drikold

C. Perhydrol

D. Mannitol

What is the correct answer?

4

Which one of the following elements is alloyed with iron to produce steel which can resist high temperatures and also have high hardness and abrasion resistance?

A. Aluminium

B. Chromium

C. Nickel

D. Tungsten

What is the correct answer?

4

Acute diabetes patients smell of

A. acetone

B. ether

C. ethyl alcohol

D. methyl alcohol

What is the correct answer?

4

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

A. electrochemistry

B. physical chemistry

C. biochemistry

D. tinctorial chemistry

What is the correct answer?

4

The most abundant noble gas present in air is

A. neon

B. argon

C. helium

D. krypton

What is the correct answer?

4

Which of the following is not a chemical change?

A. Rusting of iron

B. Burning of magnesium

C. Sublimation of iodine

D. Electrolysis of water

What is the correct answer?

4

A metal which is extracted by thermal reduction is

A. nickel

B. aluminium

C. mercury

D. calcium

What is the correct answer?

4

Rusting is

A. an oxidation process

B. a reduction process

C. a physical change

D. an electro-chemical process

What is the correct answer?

4

Iodine in alcohol is known as

A. quick lime

B. tincture iodine

C. rectified spirit

D. None of these

What is the correct answer?

4

Ascorbic acid is the chemical name for

A. Vitamin B6

B. Vitamin C

C. Vitamin K

D. Vitamin D

What is the correct answer?

4

Apart from lead tetra-ethyl, the other compound used as antiknock is

A. n-heptane

B. n-octane

C. iso-heptane

D. iso-octane

What is the correct answer?

4

Mild steel contains

A. iron with very low percentage of carbon

B. iron with high percentage of carbon

C. iron and chromium

D. iron and manganese

What is the correct answer?

4

Real gases tend to become ideal Under

A. low pressure and high temperature

B. low pressure and low temperature

C. high pressure and low temperature

D. high pressure and high temperature

What is the correct answer?

4

The commonest ore of aluminium is

A. cryolite

B. bauxite

C. malachite

D. azurite

What is the correct answer?

4

One of the ingredients of the paste on the side of a match box is

A. phosphorus pentaoxide

B. phosphorus trichloride

C. phosphorus trisulphide

D. phosphorus trioxide

What is the correct answer?

4

Which of the following is used in fuel to propel rockets?

A. Petrol

B. Kerosene

C. Hydrazine

D. Alcohol

What is the correct answer?

4

The freezing point of water at 760 mm pressure is

A. 273 K

B. 0 K

C. 273°C

D. -273°C

What is the correct answer?

4

The main constituent of gobar gas is

A. methane

B. nitrogen

C. carbondioxide

D. ethylene

What is the correct answer?

4

Lead soaps are used in

A. shaving creams

B. adhesive tapes

C. toilet powders

D. lubricants

What is the correct answer?

4

The compounds produced by plants in the process of photosynthesis are

A. carbohydrates

B. proteins

C. salts

D. fats

What is the correct answer?

4

The flux added in the blast furnace is

A. Limestone

B. FeO

C. SiO2

D. MgO

What is the correct answer?

4

Which of the following statements regarding natural radioactivity is true?

A. It is spontaneous disintegration of atoms

B. It is induced by bombardment with projectiles

C. It is transmutation of atoms with projectiles

D. It is dependent on temperature

What is the correct answer?

4

A non-metal which is a good conductor or heat and electricity is

A. iodine

B. sulphur

C. graphite

D. phosphorus

What is the correct answer?

4

The sugar which is used in silvering mirrors is

A. sucrose

B. maltose

C. glucose

D. fructose

What is the correct answer?

4

Laughing gas is

A. nitric oxide

B. nitrogen peroxide

C. nitrogen pentoxide

D. nitrous oxide

What is the correct answer?

4

Which of the following la a very good supporter of combustion?

A. Carbon monoxide

B. Oxygen

C. Nitrogen

D. Hydrogen

What is the correct answer?

4

Brass contains

A. copper and tin

B. aluminium and magnesium

C. copper and zinc

D. copper, tin and zinc

What is the correct answer?

4

Harmful bacteria in drinking water cannot be destroyed by

A. chlorination

B. boiling

C. adding caustic soda

D. ozonisation

What is the correct answer?

4

Water always contains hydrogen and oxygen in the ratio 1:8 by weight. This is in accordance with the

A. Law of Multiple Proportions

B. Law of Definite Proportions

C. Law of Conservation of Mass

D. Law of Reciprocal Proportions

What is the correct answer?

4

The gas evolved when ammonium nitrate is heated is

A. nitrogen

B. nitric oxide

C. nitrogen peroxide

D. nitrous oxide