Everyday Science MCQs

5120 MCQs  (Page 165 of 512)

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A solution can be both____________________?
A. Dilute and concentrated
B. Dilute and saturated
C. Saturated and unsaturated
D. Saturated and super saturated
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Consider the following redox reaction. Zn+dil HNO3? Zn (NO3)2 + N2O + H2O The coefficient number of HNO3 in the equation is__________________?
A. 6
B. 8
C. 10
D. 4
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Which of the following elements react with steam to produce H2 gas?
A. Pd
B. Ni
C. Sn
D. All of the above
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The unit of the rate constant (k) is same as that of rate of reaction________________?
A. First order reaction
B. Second order reaction
C. Zero order reaction
D. Third order reaction
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Acid present in acid rain may be_________________?
A. H2so4
B. Hno3
C. Both a and b
D. None of the above
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Which of the following elements conduct electricity and also melts below 100°C ?
A. Aluminium
B. Sodium
C. Carbon
D. Sulphur
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The compound which is added to leaded gasoline to save engine from lead oxide and lead sulphate deposits is__________________?
A. Ethylene iodide
B. Ethylene bromide
C. Ethylene chloride
D. Ethylene fluoride
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Isotopes differs in______________________?
A. Arrangement of electrons in orbitals
B. Position in the periodic table
C. Properties depend upon mass
D. Chemical properties
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The volume occupied by 1.4g CO at S.T.P is___________________?
A. 22.4 dm3
B. 2.24 dm3
C. 1.12 cm3
D. 1.12 dm3
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Which of the following set has all species isoelectronic__________________?
A. F – cl – br
B. Li+1 – na+1 – k+1
C. F – ne – na+
D. H+ – h- – h
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Word of the Day
23 Jul
Aisle
a passage between rows of seats in a building such as a church or theatre, an aircraft, or train.
طویل تنگ راستہ، نشتوں کے درمیان راستہ

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