Everyday Science MCQs

5120 MCQs  (Page 315 of 512)

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Unit of Kc is_______________?
A. Moles2dm+6
B. Moles-2dm+6
C. Moles+2dm-6
D. Kc may or may not have units
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Rate expression for ammonia synthesis is___________________?
A. Kc=x2/(a-x)(b-x)
B. Kc=x2/v(a-x)
C. Kc=4×2/(a-2x)2(b-x)
D. Kc=4x2v2/(a-x)(b-3x)3
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Catalyst used to speed up the reaction of ammonia synthesis is________________________?
A. V2o5
B. V2o5 and pt
C. Fe
D. Pieces of fe crystals are embedded in fused mixture of mgo al2o3 and sio2
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By the addition of base in waterpH will be_______________?
A. More than 7
B. Less than 7
C. Equal to 7
D. No effect
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Negative log of mular concentration of H+ ions is called___________________?
A. Ph
B. Poh
C. Pka
D. Pkw
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Any substance which accepts H+ is base favours the concept___________________?
A. Lowrys
B. Lewis
C. Arrhenius
D. None of these
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When sparingly soluble salt is in equilibrium with molar concentration of its oppositely charged ion when the product is called_________________?
A. Common ion effect
B. Solubility product
C. Dissociation constant
D. Dissociation constant for an acid
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Addition of CH3COOH and CH3COONa gives in water_______________?
A. Standard solution
B. Buffer solution
C. Acidic buffer solution
D. Both b & c
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The pH of 10-3 mol dm-3 of an aqueous solution of H2SO4 is_________________?
A. 3
B. 2.7
C. 2
D. 1.5
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If a buffer solution of higher pH than seven is to be made we use___________________?
A. Strong acid and strong base
B. Weak acid and strong base
C. Weak acid and strong base
D. Weak acid and its salt with strong base
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Word of the Day
25 Jul
January
a preference or special liking for something; a bias in favour of something.
2021:00:00

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