General Science Chemistry MCQs

Q.  Which of these metals is commonly used in tanning of leather?

a. Phosphorous
b. Indium
c. Manganese
d. Chromium


ANSWER: See Answer
 
Chromium(III) salts are used in the tanning of leather. Chromium is a steely-grey, lustrous, hard and brittle transition metal which is also used as an additive in stainless steel.
MCQs:  Which of the following is correct electronic configuration of Krypton, whose atomic number is 36?
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MCQs:  Which of the following isotope of Hydrogen has only one neutron?
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MCQs:  Which of the following salts and their chemical names are correctly paird? 1: White vitriol – Zinc sulfate 2: Red Vitriol – Copper sulfate 3: Green Vitriol – Ferrous sulfate Select the correct option from the codes given below:
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MCQs:  Crystals of a compound changes its blue color to white on heating in a closed container. However, it regains blue color after sometime when allowed to cool down. This compound is of which of the following metals?
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MCQs:  Which does the gas turn lime water milky?
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MCQs:  Seaweeds are an important source of which of the following?
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MCQs:  Which gas is used to manufacture vanaspati from vegetable oil?
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MCQs:  The nucleus of an atom consists of which of the following?
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MCQs:  Alpha (α) particles are helium (He) nucleus with a charge of
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MCQs:  When two light nuclei combine to form a heavier nucleus, the process is said to be
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MCQs:  If a C-14 has a half-life of 5730 years, then how long will it take for the number of C-14 in a sample to drop to 1/8 of initial quantity?
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MCQs:  In the nuclide defined by &¹⁵&₇X, the number of protons and neutrons respectively are
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MCQs:  The elements which emit natural radioactivity are known as
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MCQs:  In SI base units, 1 Bq is equal to
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MCQs:  A helium nucleus comprising of two protons and two neutrons with a charge of 2e is
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MCQs:  Radiations present in atmosphere due to different radioactive substances are called
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MCQs:  Gamma (γ) radiation are fast moving
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MCQs:  In air, alpha particles have range of
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MCQs:  Isotopes have same number of protons but different number of
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MCQs:  The number of protons inside nucleus represents
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