List of practice Questions

In two kingdom classification these organisms Chlamydomonas and Spirogyra respectively belong to,

In the structure of diborane

In throwing of two dice, what is the number of exhaustive events ?

In the sewage treatment, bacterial floes are allowed to sediment in a settling tank. This sediment is called as

In the sphalerite (ZnS) structure, $S^{2-}$ ions form a face-centred cubic lattice. Then from the Comers, $Zn^{2+}$ ions are present on the body diagonals at

In the right angled triangle ABC, $\angle B= 90?$, A= (2, 5, 1), B = (1, 4, -3) and C = (-2, 7, -3). If P, S, R are the orthocentre, circumcentre, circumradius of the triangle ABC then $R + P_y = $

In the Searle's method to determine the Young's modulus of a wire, a steel wire of length 156 cm and diameter 0.054 cm is taken as experimental wire. The average increase in length for $1\frac{1}{2}$ kg wt is found to be 0.05.cm. Then the Young's modulus of the wire

In the reaction,$Cu(s)+ 2Ag^+ (aq) \rightarrow Cu^{2+}(aq) + 2Ag(s)$, the reduction half cell reaction is

In the reaction, $ {H_2O_2 + Na_2 CO_3 -> Na_2O_2 + CO_2 + H_2O}$ the substance undergoing oxidation is

In the reaction of excess of $ {LiAlH_4}$ with crotonaldehyde

In the reaction, $ {3Cl_2 + 6 NaOH -> NaClO_3 + 5 NaCl + 3 H_2O }$ the element which loses as well as gains electrons is

In the reaction between $ {SO_2}$ and $ {O_3}$, the equivalent weight of ozone is

In the reaction : $Cl_2 + OH^- \to Cl^- + ClO_4 + H_2O$

In the reaction $ {2 Na_2S_2O_3 + I_2 -> Na_2 S_4 O_6 + NaI}$ the oxidation number of sulphur is

In the pressure cooker the cooking is faster because the increase of vapour pressure

In the process of insertional inactivation

In the propagation of electromagnetic waves, the angle between the direction of propagation and plane of polarisation is

In the periodic table, the maximum chemical reactivity is at the extreme left (alkali metals) and extreme right (halogens). Which properties of these two groups are responsible for this?

In the preparation of compounds of $Xe$, Bartlett had taken $O^+_2\, PtF_6^-$ as a base compound. This is because

In the preparation of ethyl chloride by Grooves?>[Anhyd.ZnCl_2] CH_2CH_2Cl + H_2O}$ the main reason for using anhydrous $ {ZnCl_2}$ as catalyst is that

In the presence of oxygen, removal of sulphur from the ore is done in

In the metallic crystal

In the monocot root, we obseve

In the nuclear reactors the moderators are used to :

In the hydroponic technique, to obtain the optimum growth, nutrient solutions must be