The luminous objects emit

A. Light
B. Energy
C. Waves
D. None of these

Correct Answer: A

Objects that give out or emit light of their own are called as luminous objects . Sun, Bulb and candle emit their own light and hence, are luminous objects.

The escape of water molecules from surface is called:

A. Sublimation
B. Condensation
C. Evaporation
D. None of these

Correct Answer: C

Cooking gas is also called:

A. Butane
B. Propane
C. Hexane
D. None of these

Correct Answer: A

Cooking gas is also known as liquified Petroleum Gas (LPG), is a mixture of propane and butane. It is better suited to indoor use, and fuelling appliances like portable gas heaters and single-burner cooking stoves.

An ordinary mobile phone communicates by using:

A. Microwaves
B. Radio waves
C. Infrared waves
D. None of these

Correct Answer: B

Heating element of an electric heater is made up of which metal?

A. Lead
B. Tungsten
C. Nichrome
D. None of these

Correct Answer: C

Nichrome is a metal alloy made up of around 20 percent of chromium and 80 percent nickel. Nichrome has a high melting point and it won’t oxidise at higher temperature

Kidney stone is caused due to:

A. Sulfur dioxide
B. Aluminum oxide
C. Calcium oxalate
D. None of these

Correct Answer: C

Some foods that contain high levels of oxalate include: peanuts, spinach, chocolate , Beets and sweet potatoes. Moderating intake of these foods may be beneficial for people who form calcium oxalate stones.

Nitrogenous wastes excreted through urine in human is:

A. Urea
B. Ammonia
C. Uric acid
D. None of these

Correct Answer: A

Humans and most other mammals produce urea as the nitrogenous waste, which is filtered out from the blood by kidneys and excreted out.

Alternative current (AC) is converted into direct current (DC) by using a:

A. Generator
B. Rectifier
C. Voltmeter
D. None of these

Correct Answer: B

Direct current (DC) is converted into alternating current (AC) by using a Inverter.

The largest gland in the human body is:

A. Heart
B. Kidney
C. Liver
D. None of these

Correct Answer: C

The Pineal gland is the smallest gland in the human body.

The color which we see when our eyes are closed?

A. Eigengrau
B. Grey
C. Black
D. None of these

Correct Answer: A

The colour you see when you close your eyes is not black. It’s lighter than black and is called Eigengrau.