In fireworks,the green flame is produced because of __________...? Mcqs

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In fireworks,the green flame is produced because of __________...?

(A) Sodium
(B) Barium

(C) Mercury
(D) Potassium

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Two bulbs are connected in a parallel circuit. One bulb blows (blast), what will happen to the other bulb...?

(A) Also blow (blast)
(B) Go out (be turned off)

(C) Glows brighter
(D) Remains same

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The SI unit of Heat is________...?

(A) Watt
(B) Volt

(C) Joule
(D) Newton

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The association between two different types of organism which get benefit to each other, cannot live without each other is called...?

(A) Parasitism
(B) Commensalism

(C) Mutualism
(D) Predation

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Water vapour turns into clouds in the atmosphere when:...?

(A) It rains
(B) The temperature rise

(C) Dew point is reached
(D) Evaporation takes place

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A man pulls a crate of mass 25 kg across the leveled ground with a horizontal force of 60 N. A constant force of friction of 20 N acts on the sledge. What is the acceleration of the sledge...?

(A) 0.63 ms^-2
(B) 1.6 ms^-2

(C) 2.4 ms^-2
(D) 3.2 ms^-2

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The atoms of same element which have the same atomic number but different mass numbers are known as...?

(A) Isotopes
(B) Isoelectronic

(C) Isomers
(D) Isobars

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The study of distribution of different living organisms in different regions of the world is called...?

(A) Ecology
(B) Biogeography

(C) Zoogeography
(D) Biotechnology

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Vitamin C is essential for___________...?

(A) Appetite
(B) Growth & repairing of tissues

(C) Muscles
(D) Brain

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The deficiency of vitamin E causes _______ ...?

(A) Weak immune system
(B) Weak bones

(C) Lack of appetite
(D) Sterility

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