In comparison to boron, berylium has

The reaction at cathode in the cells commonly used in clocks involves _______.

0.1 M solution of KI reacts with excess of \(\mathrm{H}_2 \mathrm{SO}_4\) and \(\mathrm{KIO}_3\) solutions. According to equation
\(5 \mathrm{I}^{-}+\mathrm{IO}_3^{-}+6 \mathrm{H}^{+} \rightarrow 3 \mathrm{I}_2+3 \mathrm{H}_2 \mathrm{O}\)

Identify the correct statements :
(A) 200 mL of KI solution reacts with 0.004 mol of \(\mathrm{KIO}_3\)
(B) 200 mL of KI solution reacts with 0.006 mol of \(\mathrm{H}_2 \mathrm{SO}_4\)
(C) 0.5 L of KI solution produced 0.005 mol of \(\mathrm{I}_2\)
(D) Equivalent weight of \(\mathrm{KIO}_3\) is equal to ( \(\frac{\text { Molecular weight }}{5}\) )

Choose the correct answer from the options given below :

Some \(\mathrm{CO}_2\) gas was kept in a sealed container at a pressure of 1 atm and at 273 K . This entire amount of \(\mathrm{CO}_2\) gas was later passed through an aqueous solution of \(\mathrm{Ca}(\mathrm{OH})_2\). The excess unreacted \(\mathrm{Ca}(\mathrm{OH})_2\) was later neutralized with 0.1 M of 40 mL HCl . If the volume of the sealed container of \(\mathrm{CO}_2\) was \(x\), then \(x\) is ________ \(\mathrm{cm}^3\) (nearest integer).
[Given : The entire amount of \(\mathrm{CO}_2(\mathrm{~g})\) reacted with exactly half the initial amount of \(\mathrm{Ca}(\mathrm{OH})_2\) present in the aqueous solution.]

The dihedral angle in staggered form of Newman projection of \(1,1,1-\)Trichloro ethane is degree. (Round off to the nearest integer)

The fragrance of flowers is due to the presence of some steam volatile organic compounds called essential oils. These are generally insoluble in water at room temperature but are miscible with water vapour in vapour phase. \(A\) suitable method for the extraction of these oils from the flowers is _______.

Consider the following reaction at \(298 \mathrm{~K}\). \(\frac{3}{2} \mathrm{O}_{2(\mathrm{~g})} \rightleftharpoons \mathrm{O}_{3(\mathrm{~g})} \cdot \mathrm{K}_{\mathrm{P}}=2.47 \times 10^{-29} \text {. }\) \(\Delta_{\mathrm{r}} \mathrm{G}^{\ominus}\) for the reaction is_______ \(kJ\). (Given R \(\left.=8.314 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}\right)\)

The reading of the ammeter for a silicon diode in the given circuit is.......\(mA\)

Two particles of equal mass \(\mathrm{m}\) have respective initial velocities \(u\hat{i}\) and \(u\left(\frac{\hat{\mathrm{i}}+ \hat{\mathrm{j}}}{2}\right) .\) They collide completely inelastically. The energy lost in the process is

A capacitor of reactance \(4 \sqrt{3} \Omega\) and a resistor of resistance \(4 \Omega\) are connected in series with an ac source of peak value \(8 \sqrt{2} \mathrm{~V}\). The power dissipation in the circuit is _______ \(W\).

The mass and the diameter of a planet are three times the respective values for the Earth. The period of oscillation of a simple pendulum on the Earth is \(2\,s\). The period of oscillation of the same pendulum on the planet would be

A solution containing active cobalt \({}_{27}^{60}Co\) having activity of \(0.8\,\mu Ci\) and decay constant \(\lambda \) is injected in an animal's body. If \(1 \,cm^3\) of blood is drawn from the animal's body after \(10\, hrs\) of injection, the activity found was \(300\, decays\) per minute. What is the volume of blood that is flowing in the body?..........\(litres\) ( \(ICi = 3.7 \times 10^{10}\) decay per second and at \(t = 10\, hrs\) \({e^{ - \lambda t}} = 0.84\) )

A point charge of \(10^{-8} C\) is placed at origin. The work done in moving a point charge \(2 \mu C\) from point \(A (4,4,2) m\) to \(B (2,2,1) m\) is _________ J.