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Chemistry-

General

Easy

Question

The tetravalent elements A and B form dioxides both react with NaOH to form similar salts $straight angle O A O$ is 1800 , $straight angle O B O$ is 1090 281 .Both are acidic in nature A and B are respectively

Ge and Si
S and Si
C and Si
Si and C

The correct answer is: C and Si

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5 persons $a comma$ $b comma$ $c comma$ $d comma$ $e$ are contesting in an election Three persons are to be selected If one of them $d$ has been selected uncontested, the probability that $c$ would be selected is

5 persons $a comma$ $b comma$ $c comma$ $d comma$ $e$ are contesting in an election Three persons are to be selected If one of them $d$ has been selected uncontested, the probability that $c$ would be selected is

The probability that the birthdays of 12 girls will fall on 12 different calendar month of a year is

The probability that the birthdays of 12 girls will fall on 12 different calendar month of a year is

Four tickets numbered 00, 01, 10, 11 are placed in a bag A ticket is drawn at random and replaced Again a ticket is drawn at random The probability that the sum of the numbers on the tickets drawn is 21

Four tickets numbered 00, 01, 10, 11 are placed in a bag A ticket is drawn at random and replaced Again a ticket is drawn at random The probability that the sum of the numbers on the tickets drawn is 21

parallel

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Graphite is a soft solid lubricant extremely difficult to melt The reason for this anamolous behaviour of graphite –

Chemistry-General

Hydrolysis of SiCl₄ gives compound 'X' and HCl on heating to 1000°C'X' loses water and forms 'Y' Identify 'X' and 'Y' respectively

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Chemistry-General

A bag contains 17 counters marked with numbers 1 to 17 on chits A counter is drawn and replaced A second draw is then made The chance that the number on the counter drawn 1st is even and the second is odd is

A bag contains 17 counters marked with numbers 1 to 17 on chits A counter is drawn and replaced A second draw is then made The chance that the number on the counter drawn 1st is even and the second is odd is

parallel

From a bag containing 4 white and 5 black balls 3 are drawn at random The odds against these being all black balls is

From a bag containing 4 white and 5 black balls 3 are drawn at random The odds against these being all black balls is

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parallel

Two charges $plus 3.2 cross times 1 0 to the power of negative 19 end exponent C$ and $negative 3.2 cross times 1 0 to the power of negative 9 end exponent C$ kept 2.4 $text Å end text$ apart forms a dipole. If it is kept in uniform electric field of intensity $4 cross times 1 0 to the power of 5 end exponent v o l t rightwards arrow over short leftwards arrow divided by rightwards arrow over short leftwards arrow m$ then what will be its electrical energy in equilibrium

Two charges $plus 3.2 cross times 1 0 to the power of negative 19 end exponent C$ and $negative 3.2 cross times 1 0 to the power of negative 9 end exponent C$ kept 2.4 $text Å end text$ apart forms a dipole. If it is kept in uniform electric field of intensity $4 cross times 1 0 to the power of 5 end exponent v o l t rightwards arrow over short leftwards arrow divided by rightwards arrow over short leftwards arrow m$ then what will be its electrical energy in equilibrium

Physics-General

Two electric dipoles of moment P and 64 P are placed in opposite direction on a line at a distance of 25 cm. The electric field will be zero at point between the dipoles whose distance from the dipole of moment P is

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Physics-General

If A and $B$ are two independent events in a sample space $S$ then $P left parenthesis A intersection B right parenthesis equals$

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parallel

The probability of an impossible event is

The probability of an impossible event is

An electric dipole in a uniform electric field experiences (When it is placed at an angle $theta$ with the field)

An electric dipole in a uniform electric field experiences (When it is placed at an angle $theta$ with the field)

Physics-General

An electron and a proton are at a distance of $1 Å$ . The moment of this dipole will be (C $cross times$ m)

An electron and a proton are at a distance of $1 Å$ . The moment of this dipole will be (C $cross times$ m)

Physics-General

parallel

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