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# Science MCQ Questions with answers

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## Learn Science MCQs [Page 1 ]

Shyam Dubey ·
Coach · 50.57K points
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### Q) Which of the following is not a unit of Energy?

(A) Calorie
(B) Joule
(C) Electron Volt
(D) Watt

Explanation:
A) Joule (J). This is the basic energy unit of the metric system, or in a later more comprehensive formulation, the International System of Units (SI). It is ultimately defined in terms of the meter, kilogram, and second. B) Calorie (cal). Historically the calorie was defined in terms of the heating of water. Thus, in a traditional definition, one calorie is the amount of heat required to raise the temperature of 1 gram of water by 1°C, from 14.5 °C to 15.5 °C. (This is sometimes referred to as the 15 °C calorie, and differs slightly from the "calorie" measured for other temperature intervals.) More recently the calorie has been defined in terms of the joule; the equivalence between the calorie and joule is historically known as the mechanical equivalent of heat. C) Kilowatt-hour (kWh). The kilowatt-hour is a standard unit of electricity production and consumption. By definition, noting that 1 kilowatt = 1000 watts:

Shyam Dubey ·
Coach · 50.57K points
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### Q) What is the chemical formula of Carbon Monoxide?

(A) CO2
(B) CO
(C) C2O4
(D) None

No Explanation found. Add Explanation and get +2 points.

Vaibhav kharat ·
Newbie · 0 points
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### Q) Unit of current

(A) Ampere
(B) Weber
(C) Volt
(D) Voltperm2

No Explanation found. Add Explanation and get +2 points.

Newbie · 0 points
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### Q) Transmitted by a wave -

(A) Amplitude
(B) Frequency
(C) Wavelength
(D) Pitch

No Explanation found. Add Explanation and get +2 points.

Priyanka Tomar ·
Tutor III · 7.54K points
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### Q) What is the value of g?

(A) 10 m/sec²
(B) 9.8 m/sec
(C) 9.8 m/sec²
(D) 10 m/sec

No Explanation found. Add Explanation and get +2 points.

Shyam Dubey ·
Coach · 50.57K points
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### Q) What is the full form of LASER?

(B) Light Amplification by Stimulated Emission of Radiation

No Explanation found. Add Explanation and get +2 points.

Shyam Dubey ·
Coach · 50.57K points
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### Q) Which type of waves are used by a ‘RADAR’ for detecting the presence of an aircraft?

(A) Sound waves
(B) Electric waves
(D) Ultrasonic waves

No Explanation found. Add Explanation and get +2 points.

Shyam Dubey ·
Coach · 50.57K points
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### Q) Which of the following is a Lewis acid ?

(A) AlCl3
(B) BaCl2
(C) CaCl2
(D) AgCl2

No Explanation found. Add Explanation and get +2 points.

Ranjeet ·
Tutor III · 6.33K points
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### Q) Brass gets discoloured in air because of the presence of which of the following gases in air?

(A) Oxygen
(B) Hydrogen sulphide
(C) Carbon dioxide
(D) Nitrogen

No Explanation found. Add Explanation and get +2 points.

Ranjeet ·
Tutor III · 6.33K points
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### Q) Which of the following is a non metal that remains liquid at room temperature?

(A) Phosphorus
(B) Bromine
(C) Chlorine
(D) Helium

No Explanation found. Add Explanation and get +2 points.

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