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The molarity of a solution obtained by mixing 750 mL of 0.5 (M) HCl with 250 mL of 2(M)HCl will be:

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The coagulating power of electrolytes having ions $Na_{+},Al_{3+}andBa_{2+}$ for arsenic sulphide sol increases in the order:

If $α,β=0$, and $f(n)=α_{n}+β_{n}$and \displaystyle{\mid}{3}{1}+{f}

What is the minimum energy required to launch a satellite of mass m from the surface of a planet of mass M and radius R in a circular orbit at an altitude of 2R?

The period of oscillation of a simple pendulum is $T=2πgL .$ Measured value of L is 20.0 cm known to 1 mm accuracy and time for 100 oscillations of the pendulum is found to be 90 s using wrist watch of 1 s resolution. The accuracy in the determination of g is :

The ionic radii (in Å) of $N_{3−},O_{2−}$ and $F_{−}$ are respectively :

Let a and b be the roots of equation $px_{2}+qx+r=0,p=0.$. If p, q, r are in A.P. and $α1 +β1 =4$, then the value of $∣α−β∣$ is

A diode detector is used to detect an amplitude modulated wave of 60% modulation by using a condenser of capacity 250 pico farad in parallel with a load resistance 100 kilo ohm. Find the maximum modulated frequency which could be detected by it.

A pendulum made of a uniform wire of cross sectional are A has time period T. When an additional mass M is added to its bob, the time period changes to $T_{M}$. If the Young's modulus of the material of the wire is Y then $Y1 $ is equal to : (g = gravitational acceleration)