Question:

Helium gas is used in gas balloons instead of hydrogen gas be-cause it is –

A.

lighter than hydrogen

B.

more abundant than hydrogen

C.

non-combustible

D.

more stable

Answer» c. non-combustible

Question:

Which among the following elements is found in maximum percentage in the human body?

A.

Carbon

B.

Hydrogen

C.

Nitrozen

D.

Oxyzen

Answer» d. Oxyzen

Question:

The fiber least prone to catch fire is –

A.

nylon

B.

polyester

C.

cotton

D.

terylene

Answer» c. cotton

Question:

Vulcanization of rubber is carried out by adding –

A.

Sulphur

B.

Carbon

C.

Ozone

D.

Phosphorus

Answer» a. Sulphur

Question:

Which of the following hormone is called emergency hormone?

A.

Insulin

B.

Adrenaline

C.

Oestrogen

D.

Oxytocir

Answer» b. Adrenaline

Question:

What is the common characteristic of the elements of the same group in the periodic table?

A.

Electrons in outer most shell

B.

Total number of electrons

C.

Total number of protons

D.

Atomic weight

Answer» a. Electrons in outer most shell

Question:

The polymer used in making plastic crockery is –

A.

Decron

B.

Nylon

C.

Bakelite

D.

Melamine

Answer» d. Melamine

Question:

The wire of flash bulb is made of :

A.

Copper

B.

Barium

C.

Magnesium

D.

Silver

Answer» c. Magnesium

Question:

Which of the following acids is present in sour milk?

A.

Formic acid

B.

Lactic acid

C.

Citric acid

D.

Tartaric acid

Answer» b. Lactic acid