Chemistry - Mock Test 1

Question 1

साधारण नमक (Common Salt) का रासायनिक नाम क्या है?

A) सोडियम क्लोराइड (NaCl) B) कैल्शियम कार्बोनेट (CaCO3) C) सोडियम बाइकार्बोनेट (NaHCO3) D) सल्फ्यूरिक एसिड (H2SO4)

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साधारण नमक का रासायनिक नाम सोडियम क्लोराइड (Sodium Chloride) है, और इसका रासायनिक सूत्र NaCl होता है।

Question 2

With increase of temperature, which of these changes

A) Molality B) Weight fraction of solute C) Fraction of solute present in water D) Mole fraction

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Question 3

What volume of hydrogen gas, at 273 K and 1 atm. pressure will be consumed in obtaining 21.6 g of elemental boron (atomic mass = 10.8) from the reduction of boron trichloride by hydrogen

A) 89.6 L B) 67.2 L C) 44.8 L D) 22.4 L

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Question 4

If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will

A) decrease twice B) increase two fold C) remain unchanged D) be a function of the molecular mass of the substance.

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Question 5

The molarity of a solution obtained by mixing 750 mL of 0.5 M HCl with 250 mL of 2 M HCl will be

A) 0.975 M B) 0.875 M C) 1.00 M D) 1.75 M

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Question 6

Which statement is true about isotopes of the same element

A) They have the same number of protons. B) They have the same number of neutrons. C) They have a different atomic number. D) They have the same mass.

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Question 7

Which of the following is a property of alkali metals

A) They are so hard they cannot be cut. B) They are very reactive. C) They are stored in water. D) They have few uses.

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Question 8

Which of the following statements describes most metals

A) They are easily shattere4⃣ B) They are gases at room temperature. C) They are dull. D) 2⃣ They are gases at room temperature. 3⃣ They are dull.

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Question 9

Which one of the following tells the physical state of an element at room temperature

A) the atomic number B) the color of the chemical symbol C) the atomic mass D) the element name

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Question 10

Periodic describes

A) something that occurs at regular intervals. B) something that occurs very rarely. C) something that occurs frequently. D) something that occurs three or four times a year.

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