| Oxide | Nature | ||
|---|---|---|---|
| (a) | CO | (ii) | Neutral |
| (b) | BaO | (i) | Basic |
| (c) | \(Al_{2}O_{3}\) | (iv) | Amphoteric |
| (d) | \(Cl_{2}O_{7}\) | (iii) | Acidic |
Which of the following statements are true?
A. Unlike Ga that has a very high melting point, Cs has a very low melting point.
B. On Pauling scale, the electronegativity values of N and C are not the same.
C. $Ar, K^{+}, Cl^{–}, Ca^{2+} and S^{2–}$ are all isoelectronic species.
D. The correct order of the first ionization enthalpies of Na, Mg, Al, and Si is Si $>$ Al $>$ Mg $>$ Na.
E. The atomic radius of Cs is greater than that of Li and Rb.
Choose the correct answer from the options given below:
For the reaction A(g) $\rightleftharpoons$ 2B(g), the backward reaction rate constant is higher than the forward reaction rate constant by a factor of 2500, at 1000 K.
[Given: R = 0.0831 atm $mol^{–1} K^{–1}$]
$K_p$ for the reaction at 1000 K is:
Among the following, choose the ones with an equal number of atoms.
Choose the correct answer from the options given below:
Predict the major product $ P $ in the following sequence of reactions:
(i) HBr, benzoyl peroxide
(ii) KCN
(iii) Na(Hg), $C_{2}H_{5}OH$
| List-I (Oxoacids of Sulphur) | List-II (Bonds) | ||
| A | Peroxodisulphuric acid | I | Two S–OH, Four S=O, One S–O–S |
| B | Sulphuric acid | II | Two S–OH, One S=O |
| C | Pyrosulphuric acid | III | Two S–OH, Four S=O, One S–O–O–S |
| D | Sulphurous acid | IV | Two S–OH, Two S=O |
| List-I | List-II | ||
| A. | Coke | I. | Carbon atoms are sp3 hybridized. |
| B. | Diamond | II. | Used as a dry lubricant. |
| C. | Fullerene | III. | Used as a reducing agent. |
| D. | Graphite | IV. | Cage like molecules |
A constant voltage of 50 V is maintained between the points A and B of the circuit shown in the figure. The current through the branch CD of the circuit is :
| List I | List II |
|---|---|
| A. The Evil Quartet | III. Causes of biodiversity losses |
| B. Ex situ conservation | I. Cryopreservation |
| C. Lantana camara | II. Alien species invasion |
| D. Dodo | IV. Extinction |