Apart from tetrahedral geometry, another possible geometry for `CH_4` is square planar with the four H atoms at the corners of the square and the C atom at its centre. Explain why `CH_4` is not square planar ?

What is (are) number (s) of unpaired electron(s) in the square planar [Pt(CN)_4]^(2-) ion ?

A box is to be made from a sheet 12times12 sq.cm, by cutting equal squares from the four corners and turning up its sides. Find the length of the side of the square to be cut out, in order to obtain a box of the largest possible volume? a)6 b)4 c)3 d)2

Charges q, 2q, 3q, 4q are placed at the corners A, B, C and D of a square as shown in the following figure. The direction of electric field at the centre of the square is along

There are two current carrying planar coils made each from identical wires of length L. C_1 is circular (radius R) and C_2 is square (side a). They are so constructed that they have same frequency of oscillation when they are placed in the same uniform vec B and carry the same current. Find a in terms of R .

Read the following passage write the appropriate amount in the boxes and discuss. Govind, who is a dry land farmer from Shiralas has a 5 acre land. His family inclde his wife two children and his old mother. He borrowed one lakh twenty five thousand rupees from the bank for one year as agriculatral loan at 10 p.c.p.a . He cultivated soyabean in x acres and cotton and tur in y acres. He spent Rs. 10,000 on seeds. The expenses for fertilizers and pesticides for the soyabean crop was 2000x rupees and 4000x2 rupees were spent on wages and cultivation of land. He spent 8000 y rupees on fertilizers and pesticides and rupees 9000 y2 for wages and cultivation of land for the cotton and tur crops. Let us write the total expenditure on all the crops by using variables x and y. rupees. He harvested 5x2 quintals soyabean and sold it at Rs. 2800 per quintal. The cotton crop yield was 5/3y2 quintals which fetched Rs. 5000 per quintal. The tur crop yield was 4y quintals and was sold at Rs. 4000 per quintal. Let us write the total income in rupees that was obtained by selling the entire farm produce, with the help of an expression using variables x and y. square + square + square rupees

Select the appropriate option and complete the following paragraph. (single, double, hydrocarbons, C_(2)H_(4), C_(2)H_(6), CHCl_(3), CH_(3)Cl, methane, ethane) Carbon compounds contain carbon and hydrogen as the only two elements are called __________. The smallest hydrocarbon is ________. Another hydrocarbon is ___________with molecular formula __________. In both these hydrocarbons, the valencies of all the atoms are satisfied by the _________ bonds. If one hydrogen atom of methane is replaced by another monovalent element chlorine, then a new carbon compounds is formed. The molecular formula of this compound is ___________.

Answer the following questions: By how many -CH_2- (methylene) units do the formulae and the fist two members of homologous series ofalkane, methane (CH_4) and ethane (C_2H_6) differ? Similarly, by how many -CH_2- Units do the neighboring members ethane (C_2H_6) and propane (C_3H_8) differ from each other?

Four particles of masses 0.2 kg, 0.3 kg, 0.4 kg and 0.5 kg, respectively are kept at the comers A, B, C and D of square ABCD of side 1m. Find the M.I. about an axis passing through the point A and perpendicular to the plane of the square

If P is a point such that the ratio of the squares of the lengths of the tangents from P to the circles x^2+y^2+2x-4y-20=0 and x^2+y^2-4x+2y-44=0 is 2:3 , then the locus of P is a circle with centre

Give VBT description of bonding in each of following complexes. Predict their magnetic behavior. (iii) [Pt(CN)_4]^(2-) (square planar).