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CTET Science MCQ - General Science

21 A body having mass 2.0 kg is dropped from height 10 m. When it reaches on Earth, its kinetic energy will be (g= 9.8 m / S²)

Kinetic energy = 1/2 mv²
Here v² = u² + 2as
= 0 + 2gh
= 2 x 9.8 x 10 = 196
Now K.E = 1/2 x 2 x 196 = 196 Joule

22 The number of electrons in 1 Coulomb charge is

The number of electrons in 1 Coulomb charge is 6.24 x 10¹⁸

23 Electronic configuration of AI ^{+ + +} is

Atomic number AI = 13
=> Electronic configuration of
Al = 2,8, 3
Now, Al⁺⁺⁺ = 2,8

24 When copper turnings are heated with conc. H₂SO₄, it evolves ......... gas

Cu + 2H₂SO₄ = CuSO₄ + SO₂ + H₂o

25 When a salt is treated with dil. hydrochloric acid, a gas evolves with brisk effervescence. When this gas is passed through lime water, it turns milky. The metal salt will be

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A body having mass 2.0 kg is dropped from height 10 m. When it reaches on Earth, its kinetic energy will be (g= 9.8 m / S2)

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Kinetic energy = 1/2 mv2 Here v2 = u2 + 2as = 0 + 2gh = 2 x 9.8 x 10 = 196 Now K.E = 1/2 x…

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