List of practice Questions

What type of stoichiometric defect is shown by $ZnS$?
What volume in litres will be occupied by $4.4 \,g$ of $C0_2$ at $STP$?
What products are expected from the disproportionation reaction of hypochlorous acid?
What type of crystal defect is indicated in the diagram below ? $ { Na^{+} Cl^{-} Na^{+} Cl^{-} Na^{+} Cl^{-}}$ $ {Cl^{-} \Box \, Cl^{-} Na^{+} \Box Na^{+}}$ $ {Na^{+} Cl^{-} \Box Cl^{-} Na^{+} Cl^{-}}$ $ {Cl^{-} Na^{+} Cl^{-} Na^{+} \Box Na^{+}}$
What type of hybridisation takes place in the N atom of $NH_3$ ?
What is true of natural methods of contraception?
What is wrong about the following pair of compounds $[Cr(H_2O)6]CI_3$ and $[Cr(H_2O)_5CI]CI_2.H_2O$
What kind of isomerism exists between $[Cr(H_{2}O)_{6}]Cl_{3}$ (violet) and $[Cr(H_{2}O )_{5}Cl]Cl_{2}\cdot H_{2}O$ (greyish-green)?
What is true for "lactational amenorrhea"? (i) It means absence of menstruation. (ii) Ovulation does not occur during the lactational period. (iii) Chances of conception are almost nil upto six months following parturition. (iv) Side effects are almost nil. (v) Contraceptive efficiency reduces after the period of intense lactation. (vi) It is a natural method of contraception. (vii) It increases phagocytosis of sperms.
What is true for an ideal contraceptive ? I. It should be user-friendly. II. It should be easily available. III. It should be ineffective and reversible with least side effects. IV. It should be effective and reversible with least side effects. V. It should interfere with the sexual act of the user.
What is the value of $\tan^{-1} x + \cot^{-1} x $ ?
What is true about "Saheli"? (i) Developed at the $CDRI$, Lucknow (ii) Contains a steroidal preparation (iii) "Once-a-week" pill (iv) Many side effects (v) High contraceptive value (vi) Very few side effects (vii) Low contraceptive value
What is the value of $^nC_n$ ?
What is the value of $\sin \, 10^{\circ} + \sin \, 50^{\circ} - \sin \, 70^{\circ}$ ?
What is the value of $\left( \sin 22 \frac{1^{\circ}}{2} + \cos \, 22 \frac{1^{\circ} }{2} \right)^4$ ?
What is the value of $^nC_0$ ?
What is the value of $^nP_0$?
What is the value of inductance L for which the current in a maximum in a series L-C-R circuit with C = 10 $\mu$F and $\omega = 1000 s^{ - 1}$ ?
What is the valency of Manganese in $ {K2MnO4}$ ?
What is the value of $\cot ( - 870^{\circ})$ ?
What is the shape of the graph between the speed and kinetic energy of a body?
What is the total number of species present on earth as estimated by Robert May ?
What is the valency of carbon in $CO^{2-}_3$ ?
What is the probability that an ordinary year has $53$ Tuesdays?
What is the problem faced while using alitame as artificial sweetener?