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On treatment of 100 mL of 0.1 M solution of $CoCl_{3}.6H_{2}O$ with excess $AgNO_{3},1.2×10_{22}$ ions are precipitated. The complex is:-

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Experimentally it was found that a metal oxide has formula $M_{0.98}O.$ Metal M, is present as $M_{2+}andM_{3+}$ in its oxide. Fraction of the metal which exists as $M_{3+}$ would be:

If $x=−1$and $x=2$are extreme points of $f(x)=αg∣x∣+βx_{2}+x$, then

The magnetic field in a travelling electromagnetic wave has a peak value of 20 nT. The peak value of electric field strength is :

Stability of the species $Li_{2},Li_{2}andLi_{2}$ increases in the order of:

Energy of an electron is given by $E=−2.178_{′}10_{−18}J$ Wavelength of light required to excite an electron in an hydrogen atom from level n = 1 to n = 2 will be $(h=6.62×10_{?34}Jsandc=3.0×10_{8}ms_{?1})$

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

The area (in square units) bounded by the curves $y=x ,2y−x+3=0$, x-axis, and lying in the first quadrant is

A signal of 5 kHz frequency is amplitude modulated on a carrier wave of frequency 2 MHz. The frequencies of the resultant signal is/are :