List of practice Questions

At 25$^\circ$C, the concentration of H$^+$ ions in $ 1.00 \times 10^{-3} \, \text{M} $ aqueous solution of a weak monobasic acid having acid dissociation constant $ K_a = 4.00 \times 10^{-11} $ is $ X \times 10^{-7} \, \text{M} $. The value of $ X $ is ____. {Use: Ionic product of water $ K_w = 1.00 \times 10^{-14} $ at 25$^\circ$C
A number is increased by 25% and then decreased by 20%. What is the net % change?

What architectural structure balances the bridge weight? (Refer to the image of a truss bridge) 

Which are correct?
A. Computed tomography and magnetic resonance imaging detect cancers of internal organs.
B. Chemotherapeutic drugs are used to kill non-cancerous cells.
C. \( \alpha \)-interferon activates the cancer patients' immune system and helps in destroying the tumour.
D. Chemotherapeutic drugs are biological response modifiers.
E. In the case of leukemia, blood cell counts are decreased.
Choose the correct answer from the options given below:

Identify the city.

The complex $[Cr(NH_3)_4Cl_2]^+$ shows how many geometrical isomers?

AB is a part of an electrical circuit (see figure). The potential difference \(V_A - V_B\), at the instant when current \(i = 2\) A and is increasing at a rate of 1 amp/second is:

How many 4-digit numbers can be formed using the digits 1, 2, 3, 4, 5 without repetition such that the number is divisible by 5?
What volume will 2 moles of an ideal gas occupy at STP (Standard Temperature and Pressure)?
Which of the following is a non-invasive method to measure blood pressure?
In a communication system, the bandwidth of a signal is:
The primary function of a Wheatstone bridge is to measure:
In a transistor, the current gain is defined as:
Which of the following is the main component of natural gas?
The modulus of elasticity of concrete is approximately:
In a series RLC circuit, if the frequency of the applied voltage is increased, the impedance of the circuit:
The efficiency of a Carnot engine depends on:
Which of the following is not a valid data type in C?
Solve the following differential equation:
\[ \frac{d^2y}{dx^2} + 4\frac{dy}{dx} + 4y = 0 \]

Identify the location of the given building.

What is the primary function of the Indian Judiciary?

An object has moved through a distance can it have zero displacement if yes support your answer with an example.

A real valued function $ f: A \to B $ defined by $ f(x) = \frac{4 - x^2}{4 + x^2} \ \forall x \in A $ is a bijection. If $ -4 \in A $, then $ A \cap B = $
Match the following:
(P) Schedule H
(Q) Schedule G
(R) Schedule P
(S) Schedule F2
Descriptions:
(I) Life period of drugs
(II) Drugs used under RMP
(III) List of Prescription Drugs
(IV) Standards for surgical dressing

Acidified \(KMnO_4\) oxidizes sulphite to: