List of practice Questions

Which of the following ores will be concentrated by froth floatation method?
Raindrops falling down attain limited value of velocity because of
A voltmeter can read up to $V$ volt. When the series resistance used in the voltmeter is doubled, range of voltmeter is
Equivalent mass of $ {K_2Cr_2O_7}$ in acidic solution is equal to
75% of a first order reaction was completed in 32 minutes. When was 50% of the reaction completed
Among solids, the higher melting point is exhibited by
If $a, b, c$ are in A.P., then $7^a, 7^b,$ and $7^c$ are in
In sucrose, the glycosidic linkage is
The outer electronic configuration $s^2p^5$ is possessed by
Which of the following is a constituent of oil of wintergreen?
Which of the following molecules exist?
Which of the following pairs is isoelectronic?
$\displaystyle\lim_{x \to 0} \frac{6^{x} -3^{x} -2^{ x}+1}{x^{2}} = $
$ \frac{1 -\tan^2 15^\circ}{1 + \tan^2 15^\circ} = $
The contrapositive of the statement "If $x^2 - 1 = 0$, then $x = -1$ or $x = + 1$ " is
The locus of the centre of the circle of radius 3 which rolls on the outside of the circle $x^2+y^2 + 3x - 6y - 9 = 0$ is
The perpendicular distance between the lines $9x^2- 24xy + 16y^2 + 21x- 28y+ 10 = 0$ is
Complex forming tendency of central metal ion increases with
The conjugate acid and base of $ {HPO^{2-}_{4}}$ respectively are
The length of the latus rectum of the parabola $bx^2 - 4ay + dx + e = 0$ is
The metal ion present in insulin is?
Which one of the following statements about all the four of Spongilla, leech, dolphin and penguin is correct?
$ \sin^2 5^{\circ} + \sin^2 10^{\circ} + \sin^2 15^{\circ} +....+ \sin^2 90^{\circ} $ =
If $|\vec{a} | = 15 , |\vec{b} | = 12$ and $|\vec{a} + \vec{b} | = 20 $ then $|\vec{a} - \vec{b} | = $
If $^nC_1 + 2\, ^nC_2 + .... + n\, ^nC_n = 2n^2$, then $ n = $