HCl is an Arrhenius ___________
(A) Acid
(B) Base
(C) Salt
(D) Water
Which of the following is not a lewis acid?
(A) aluminum chloride
(B) sodium ion
(C) Sulphur tetrafluoride
(D) hydroxide ion
A strong acid has a ______________
(A) Weak conjugate acid
(B) Weak conjugate base
(C) Strong conjugate base
(D) Strong conjugate acid
Which of the following is a Lewis base?
(A) Ammonia
(B) Magnesium chloride
(C) Aluminum chloride
(D) Sodium ion
Identify a conjugate pair in the equation:
NH3 + H2O ⇌ NH4+ + OH–.
(A) Ammonia and water
(B) Water and hydroxide ion
(C) Ammonium ion and hydroxide ion.
(D) Ammonia and hydroxide ion
Water in case of HCl acts as a/an ___________, in case of ammonia acts as a/an ________
(A) Base, base
(B) Base, acid
(C) Acid, base
(D) Acid, acid
Why do we boil the extract with conc. HNO3 in Lassaigne’s test for halogens?
(A) To increase the concentration of NO3- ions
(B) To increase the solubility product of AgCl
(C) It increases the precipitation of AgCl
(D) For the decomposition of Na2S AND NaCN formed
How many different types of teeth are present in humans?
(A) Two
(B) Three
(C) Four
(D) Five
Epiglottis is made up of which of the following tissues?
(A) Ligament
(B) Tendon
(C) Cartilage
(D) Bone
Which of the following is not a major component of the food?
(A) Carbohydrates
(B) proteins
(C) Vitamins
(D) Fats
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