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PLZ EXPLAIN THESE ------"in combustion the quantity of heat produced re related to the strength of the bonds in reactants and alsi in case of products" can u give the order relation ...

KCl3+I2→ ICl+OH-→ CuI+Na2S2O3→ Sn+HNO3→ ...

A(aq)+Zn→B(g) A(aq)+C+Heat→PH3 A(aq)+NH4Cl→D(gas) ...

When an aqueous solution of sodium fluoride is electrolyzed,the gas liberated at anode is ? ...

What is the balanced chemical reaction when Aluminium sulphide becomes damp? ...

The size of d orbitals decreases in order Si>P>S>Cl but π bonding order increases in the same order.Why ? ...

Consider a case we r standing on earth and a ball is moving with a velocity v0.... so its energy is=1/2mv2.......... now when we are standing on a platform which is moving with a velocity v0, so as we see the ball is moving w ...

Why elemental nitrogen exists as diatomic molecule whereas elemental phosphorous as tetra atomic and elemental sulphur as octahedral ? ...

1)Copper oxide from Copper sulphate 2)Ferrous sulphate from Mohr's Salt 3)Anhydrous ZnCl2 from white vitrol ...

f(x)=(cosx)(sinx + sin2x + sin2t ) find range of f(x) if t is a constant.(answer in terms of t) ...

If 2cosθ=x + 1/x,2cosφ=y + 1/y,find values of 1)xmyn + 1/xmyn 2)xm/yn + yn/xm ...

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Provided n^3 unit cubes, n > 1 which are numbered from 1 to n^3. All these unit cubes are put together to form a cube with side length n. In this cube two unit cubes will be neighbors if they share at least one vertex. As ...

A spectroscopic instrument can resolve 2 nearly wavelengths λ & λ+δλ if λ/δλ < 8000. how many lines will be resolved by the instrument? ...

Let C be any circle with centre (0,√2). Prove that at the most two rational points can be there on C. (A rational point is a point both of whose coordinates are rational numbers.) (past JEE question) ...

An acid type indicator, HIn differs in colour from its conjugate base (In–). The human eye is sensitive to colour differences only when the ratio [In–] / [HIn] is greater than 10 or smaller than 0.1. What should be the mi ...

How many grams of silver could be plated out on a serving tray by electrolysis of a solution containing silver in + 1 oxidation state of period of 8.0 hours at a current of 8.6 Amperes? What is the area of the tray if the thi ...

(A) if x,y,z are 3 positive numbers in AP, then 3x+y/2y-x + 3z+y/2y-z ≥ In column II options were (p) 3 (q) 5 (r) 2 (s) 12 (t) 8 I got ≥8 So should i write the answer as 't' or pqrt ?? ...

If x1,x2...xn are roots of equation xn+p1xn-1+p2xn-2+...+pn-1x+pn=0 where p1,p2..pn real, Prove that(1+x12)(1+x22)(1+x32)..(1+xn2)=(1-p2+p4-p6+...)2+(p1-p3+p5-....)2 ...

KBr +ICl→ KF+BrF3→ ...

Q.1 ) FIND THE VALUE OF DETERMINANT : 265 240 219 240 225 198 219 198 181 Q.2) A thin lens is made with a material of refractive index 1.5 with both sides convex is dipped in water ( R.I.=1.33) , then how will it behave ? Q.3 ...

What is the order of lattice energy evolved during the formation of the following ionic compounds from their respective ion pair in gaseous state? MgO, CaF2, LiF ...

When SnCl2 is added to HgCl2 the substance formed is ? ...

Decomposition of H2O2 is slowed down by addition of which compound ? ...

What does hydrolysis of NCl3 indicate ? ...

What is the percentage p-character in the orbitals forming P-P bond in P4 ? ...

In which case the wavelength emitted is maximum? ...