The sky looks blue due to

• Dispersion of Sunlight
• Scattering of Sunlight
• Refraction of Sunlight
• None of these
Solution
Correct Option: B  [ Scattering of Sunlight ]

Explanation: The scattering of sunlight is a phenomenon that occurs when sunlight interacts with particles or molecules in the Earth's atmosphere, causing the light to change direction and spread out in various directions.

Magnetic effect of current gives rise to which force ?

• mechanical
• frictional
• spring
• gravitational
Solution
Correct Option: A  [ mechanical ]

Explanation:

The "powerhouse" of cell is:

• Nucleus
• Lysosome
• Mitochondria
• DNA
Solution
Correct Option: C  [ Mitochondria ]

Explanation: Mitochondria are membrane-bound cell organelles that generate most of the chemical energy needed to power the cell's biochemical reactions. Chemical energy produced by the mitochondria is stored in a small molecule called adenosine triphosphate (ATP).

What is the dimensions of A4 size paper?

• 210 mm X 297 mm
• 217 mm X 290 mm
• 200 mm X 300 mm
• none of these
Solution
Correct Option: A  [ A4 measures 210mm x 297mm or 8.27inches x 11.69inches ]

Explanation: Legal- 21.59mm X 35.56mm

An Obstetrician deals with:

• Child disease
• Liver disease
• Pregnancy & child birth
• Nerve disease
Solution
Correct Option: C  [ Pregnancy & child birth ]

Explanation: Obstetricians specialize in obstetrics, which deals with all aspects of pregnancy and childbirth, from prenatal care to postnatal care.

What is the name of a technology that allows telephone calls to be made over computer networks like the internet?

• VoIP
• GSM
• Modem
• CDMA
Solution
Correct Option: A  [ VoIP ]

Explanation:

Sodium stearate is a salt and is used?

• in gunpowder
• in Paint
• to make Soap
• to make fertilizer
Solution
Correct Option: C  [ to make Soap ]

Explanation:

Which of the following groups contains/contain only nonbiodegradable materials?

(i) Wood, paper, leather

(ii) Plastic, bakelite, DDT

(iii) Plastic, thermocol, wood

(iv) Thermocol, plates made from dried leaves, detergents

Select the correct answer using the codes given below.

• (i) and (ii) only
• (ii) only
• (ii) and (iii) only
• (iii) and (iv) only
Solution
Correct Option: B  [ (ii) only ]

Explanation:

Which of the following is not a nucleon?

• proton
• neutron
• electron
• positron
Solution
Correct Option: D  [ positron ]

Explanation:

The age Of trees is determined by its

• height
• girth
• general appearance
• growth rings
Solution
Correct Option: D  [ growth rings ]

Explanation: