A mixture of and Ar gases in a cylinder contains 7 g of and 8 g of Ar. If the total pressure of the mixture of the gases in the cylinder is 27 bar, the partial pressure of is:
[Use atomic masses (in g ): N=14, Ar=40]
1. 12 bar
2. 15 bar
3. 18 bar
4. 9 bar
Find the quantity that increases when the concentration of reactants in a reaction is increased.
| 1. | Heat of reaction | 2. | Threshold energy |
| 3. | Collision frequency | 4. | Activation energy |
Given that the ionic product of is 2 × . The solubility of in 0.1 M NaOH is ;
1. 2 × M
2. 1 × M
3. 1 × M
4. 2 × M
Urea reacts with water to form A which will decompose to form B. B when passed through \(\left(Cu\right)^{2 +}\) (aq), deep blue colour solution C is formed. What is the formula of C from the following?
| 1. | \(\left[Cu \left(NH_{3}\right)_{4}\right]^{2 +}\) | 2. | \(Cu \left(\right. OH \left.\right)_{2}\) |
| 3. | \(CuCO_{3} . Cu (OH)_{2}\) | 4. | \(CuSO_{4}\) |
A screw gauge has the least count of \(0.01~\text{mm}\) and there are \(50\) divisions in its circular scale. The pitch of the screw gauge is:
| 1. | \(0.25~\text{mm}\) | 2. | \(0.5~\text{mm}\) |
| 3. | \(1.0~\text{mm}\) | 4. | \(0.01~\text{mm}\) |
The mean free path for a gas, with molecular diameter \(d\) and number density \(n,\) can be expressed as:
| 1. | \( \dfrac{1}{\sqrt{2} n \pi {d}^2} \) | 2. | \( \dfrac{1}{\sqrt{2} n^2 \pi {d}^2} \) |
| 3. | \(\dfrac{1}{\sqrt{2} n^2 \pi^2 d^2} \) | 4. | \( \dfrac{1}{\sqrt{2} n \pi {d}}\) |
| 1. | four times | 2. | one-fourth |
| 3. | zero | 4. | doubled |
In a certain region of space with volume \(0.2~\text m^3,\) the electric potential is found to be \(5~\text V\) throughout. The magnitude of the electric field in this region is:
| 1. | \(0.5~\text {N/C}\) | 2. | \(1~\text {N/C}\) |
| 3. | \(5~\text {N/C}\) | 4. | zero |
Which of the following graph represents the variation of resistivity () with temperature (\(T\)) for copper?
| 1. |  |
2. |  |
| 3. |  |
4. |  |
© 2026 GoodEd Technologies Pvt. Ltd.