500 General Science For Assam Agriculture, PNRD, Assam Police, Assam TET, SSC & Railway Exam (Part-10)

General Science

For Assam Agriculture, PNRD, Assam Police, Assam TET, Forest, DECT, APSC, Railway & SSC Exam (Part-10)

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500 General Science (Part-10)

1➤ (Q) Which of the following among alkali metals is most reactive?

Ans:- Cs

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2➤ (Q) Which is the element having lowest melting point in periodic table?

Ans:- He

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3➤ (Q) Which are the elements on the right side of the periodic table?

Ans:- Non-metals

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4➤ (Q) Which transition metal is in liquid state?

Ans:- Mercury

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5➤ (Q) Which electronic configurations exhibits metallic character?

Ans:- 2, 8, 2

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6➤ (Q) Which element has the lowest electron affinity?

Ans:- Argon

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7➤ (Q) By whom was the calculation of electro negativities first done?

Ans:- Pauling

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8➤ (Q) Which element does not exist in liquid state at room temperature ?

Ans:- Na

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9➤ (Q) What is the most electropositive amongst the alkaline earth metals?

Ans:- Barium

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10➤ (Q) Which block of elements is mostly metals with high B.P., M.P. values?

Ans:- d-block

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11➤ (Q) Which are the vertical lines in modern periodic table called?

Ans:- Group

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12➤ (Q) What is horizontal line in modern periodic table called?

Ans:- Period

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13➤ (Q) In a period, the elements are arranged in which order?

Ans:- Increasing charges in the nucleus

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14➤ (Q) Which noble gas does not have octet of electrons in its outer shell?

Ans:- He

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15➤ (Q) Which pair of elements is in the same period of the periodic table?

Ans:- Na, Cl

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16➤ (Q) Why is the electron affinity of chlorine highest than that of fluorine?

Ans:- Smaller nuclear charge

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17➤ (Q) What is the Electron affinity of noble gases?

Ans:- Almost zero

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18➤ (Q) Which mirror is to be used to obtain a parallel beam of light from a small lamp ?

Ans:- Concave mirror

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19➤ (Q) The focal length of the lens in a photographic camera is 5 cm. What is the power of the lens?

Ans:- + 20 D

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20➤ (Q) When viewed in white light, why do soap bubbles show colours?

Ans:- Because of interference

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