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Air (at atmospheric pressure) at a dry bulb temperature of ${40}^{\circ }C$ and wet bulb temperature of ${20}^{\circ }C$ is humidified in an air washer operating with continuous water recirculation. The wet bulb depression (i.e., the difference between the dry and wet bulb temperatures) at the exit is 25% of that at the inlet. The dry bulb temperature at the exit of the air washer is closest to

If a dice is a unit cell, then what type of crystal system is it?

An organic compound contains carbon, hydrogen and oxygen. Its chemical analysis gave $C,38.71\%$ and $H,9.67\%$. The empirical formula of compound would be

Among following transformations, the hybridization of the central atom remains unchanged in

The standard change in Gibbs energy for the reaction: $H_{2}O\rightleftharpoons H^{+}+O{H}^{-}$ at ${25}^{\circ }C$

Which of the following is/are true in case of molecules?

Which of the following is not a chalcogen?

In Ostwald’s process for the manufacture of nitric acid, the first step involves the oxidation of ammonia gas by oxygen gas to give nitric oxide gas and steam. What is the maximum weight of nitric oxide that can be obtained starting only with 10.00 g. of ammonia and 20.00 g of oxygen?

From $B_2{H}_6$, the following can be prepared, except for:

In a protein molecule, various amino acids are linked together by

Which of the following arrangement cannot be possible?

The halides in which the halogen atom is bonded to an sp² hybridised carbon of a carbon-carbon double bond are:

Atomic radii of fluorine and neon in Angstrom units are respectively given by

Which of the following colligative properties is best suited for finding the molar mass of a substance?

The pair(s) of ions where both the ions are precipitated upon passing $H_{2}S$ gas in presence of dilute $HCl$, is/are:

The frequency of revolution of electrons in H-atom and orbit 'N' is 8.23 × 1014 rev/s. The number of radial and angular node in Ns are x and y respectively. The value of x – y is

Conductivity of a cell $\left(\kappa \right)$ is equal to



where,

$R$ is resistance

$G$ is conductance

$G^{\ast }$ is cell constant

$l$ is length of the conducting cell

$A$ is cross section of cell

With increased in atomic no.along the period of table from left to right what will be happen with with ionasation energy of element

Aniline was first prepared by

Explain why $N{H}_3$ is basic while $Bi{H}_3$ is only feebly baisc?

What will be the oxidation number of $I$ in the $K{I}_3$ ?