Which one of the following is not a sign of chemical change...? Mcqs

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Which one of the following is not a sign of chemical change...?

(A) No change in composition
(B) A release of gas

(C) Change in colour, temperature, smell
(D) Production of a new material

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Which pigment is responsible for the red color inside a watermelon...?

(A) Lycopene
(B) Beta Carotene

(C) Alpha Carotene
(D) All of these

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Gales occur when the wind moves at the speed of _____ ...?

(A) 35 km/h
(B) 55 km/h

(C) 75 km/h
(D) 100 km/h

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The unit of Kc for reaction N2 + O2 ⇌ 2NO...?

(A) mol dm^-3
(B) mol^-2 dm^6

(C) mol^-1dm3
(D) No unit

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Spider, ticks, and mites belong to which class...?

(A) Insecta
(B) Arachnida

(C) Crustacea
(D) Myriapoda

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Where do most of Asteroids lie...?

(A) In asteroid belt between the orbits of Mars and Jupiter
(B) In asteroid belt between the orbits of Mars and Venus

(C) In asteroid belt between the orbits of Jupiter and Venus
(D) Everywhere in the sky

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A temporary magnet should be made from _______...?

(A) Copper
(B) Tin

(C) Iron
(D) None

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Which of the following animal is secondary consumer...?

(A) Dog
(B) Cat

(C) Cow
(D) Both A and B

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Atomic power plant works on the principle of...?

(A) fission
(B) fusion

(C) thermal combustion
(D) combined effect of all the above three

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According to World Health Organization (WHO), the industrial limit of sound in the industries must be...?

(A) 80 dB
(B) 75 dB

(C) 85 dB
(D) 100 dB

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