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Bi-focal lens are required to correct

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(a) astigmatism (b) coma (c) myopia (d) presbyopia

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Class 10 science 3 years 3 Answers 125 views Enlightened 1

Assertion: Magnesium ribbon keeps on burning in atmosphere of nitrogen. Reason: Magnesium reacts with nitrogen to form magnesium nitrides and this reaction is combination reaction.

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(a) Both A and R are true and R is the correct explanation of A. (b) Both A and R are true but R is not the correct explanation of A. (c) A is true but R is false. (d) ...

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Class 10 science 3 years 3 Answers 135 views Enlightened 0

Sodium carbonate is a basic salt because it is a salt of

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(a) weak acid and weak base (b) strong acid and weak base (c) weak acid and strong base

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Class 10 science 3 years 2 Answers 37 views Enlightened 0

The above image shows a thin lens of focal length 5m.

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The above image shows a thin lens of focal length 5m. (i) What is the kind of lens shown in the above figure? (ii) If a real inverted image is to be formed by this lens at a distance of ...

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CBSE Sample Paper 1 year 2 Answers 1335 views Tech Professional 0

change in focal length of an eye lens is caused by the action of the

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(a) pupil (b) retina (c) ciliary muscles (d) iris

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Class 10 science 3 years 2 Answers 3 views Enlightened 0

3.If one of the zeroes of a quadratic polynomial of the form x2 + ax + b is the negative of the other, then it

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(A) has no linear term and the constant term is negative. (B) has no linear term and the constant term is positive. (C) can have a linear term but the constant term is negative. (D) can have a linear term ...

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Class 10 Maths 3 years 2 Answers 15 views Enlightened 0

Dilute acid does not produce carbon dioxide on being treated with:

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a. Marble b. Lime c. Baking soda d. Limestone

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Class 10 science 3 years 2 Answers 17 views Enlightened 0

. Assertion: In a balanced chemical equation, total mass of the each element towards reactant side= total mass of the same element towards product side. Reason: Mass can neither be created nor destroyed during a chemical change.

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(a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion. · (b) Both Assertion and Reason are true but Reason is not the correct -explanation of Assertion. (c) Assertion is true but Reason is false.(d) ...

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Class 10 science 3 years 2 Answers 23 views Enlightened 0

The light sensitive cell present on retina and is sensitive to the intensity of light is:

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A. cones B. Rod cell C. Both cone and rod cells D. None

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Class 10 science 3 years 2 Answers 13 views Enlightened 0

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