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PRACTICE TEST: SOLID STATE AND SOLUTION

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PRACTICE TEST NO. 01CHAPTER : SOLID STATE AND SOLUTIONTIME: 1 ½ HR.M.M. 30Q.NO. 1 – 4 CARRIES 1 MARK, 5-9 CARRIES 2 MARKS, 10-11 CARRIES 3 MARKS AND Q.NO. 12-13 CARRIES 5 MARKSALL THE QUESTION ARE COMPULSORYHenry’s law constant for the molality of methane in benzene at 298 Kis 4.27 × 105 mm Hg. Calculate the solubility of methane in benzene at 298 Kunder 760 mm Hg.What is the vont hoff factor for K4[Fe(CN)6]Why is glass considered a super cooled liquid?Henry’s law constant for CO2 in water is 1.67 × 108 Pa at 298 K. Calculate the quantity of CO2 in 500 mL of soda water when packed under 2.5 atm CO2 pressure at 298 K.A compound forms hexagonal close-packed structure. What is the total number of voids in 0.5 mol of it? How many of these are tetrahedral voids?A compound is formed by two elements M and N. The element N forms ccp and atoms of M occupy 1/3rd of tetrahedral voids. What is the formula of the compound?Classify each of the following as being either a p-type or an n-type semiconductor:(i) Ge doped with In (ii) B doped with Si.Calculate the mass percentage of benzene (C6H6) and carbon tetrachloride (CCl4) if 22 g of benzene is dissolved in 122 g of carbon tetrachloride.Niobium crystallises in body-centred cubic structure. If density is 8.55 g cm−3, calculate atomic radius of niobium using its atomic mass 93 u.Vapour pressure of pure water at 298 K is 23.8 mm Hg. 50 g of urea (NH2CONH2) is dissolved in 850 g of water. Calculate the vapour pressure of water for this solution and its relative lowering.Aluminium crystallises in a cubic close-packed structure. Its metallic radius is 125 pm.(i) What is the length of the side of the unit cell?(ii) How many unit cells are there in 1.00 cm3 of aluminium?Or//Calculate the efficiency of packing in case of a metal crystal for(i) simple cubic(ii) body-centred cubic(iii) face-centred cubic (with the assumptions that atoms are touching each other).If the radius of the octachedral void is r and radius of the atoms in close packing is R, derive relation between r and R.The air is a mixture of a number of gases. The major components are oxygenand nitrogen with approximate proportion of 20% is to 79% by volume at 298K. The water is in equilibrium with air at a pressure of 10 atm. At 298 Kif theHenry’s law constants for oxygen and nitrogen are 3.30 × 107 mm and 6.51 × 107 mm respectively, calculate the composition of these gases in water.Or//Calculate the depression in the freezing point of water when 10 g of CH3CH2CHClCOOH is added to 250 g of water. Ka = 1.4 × 10−3, Kf = 1.86K kg mol−1.

Description
MANISH TULI
PGT CHEMISTRY
JAWAHAR NAVODAYA VIDYALAYA
AMARKANTAK (ANUPPUR) M.P.

ENRICHMENT OF CHEMISTRY IN CLASS ROOM TEACHING
Teaching of chemistry needs skill to make the platform for the understanding of the subject. The high order concepts accumulation can sublime and distil off the difficulty of the student. The word chemistry abbreviates the traits of learning:
C - CONFIDENCE, CURIOSITY, CREATIVITY
H- HONESTY AND HEALING
E – EFFORT AND EXCELLENCE
M – MEDITATION
I – INTEREST
S – SINCERIETY
T- TRIAL
R- RESEARCH AND REACTION TIME
Y- YOUTHFULLNESS

The Objectives of teaching is the transition of ideas and concepts, while teaching of Chemistry the difficulties are with the abilities to assimilate the concept and configuration of literature of chemistry.
The dealing of Chemistry subject in junior classes can be framed with the objectives and aspects mentioned.
• The topics should be reviewed and researched to predict all the possible feedbacks
• The concept should be correlated with the daily examples and doings to make the concept relevant and realistic.
• The concept delivered in Junior class needs activity and doings to make the experience of concept.
• The dealing of concept should be empathetically by the Teachers for the taught.
• The concepts deliver should thought provoking and creativity building.
• The teaching should be with proper and comfortable communication. The major problems arise due to communication gaps and accent.
• The Dealing of subject matter should correlate with the previous knowledge and facts the learner encounters with.
• The consequences of the concept and there application should be crystal clear to the taught.
• The High Order Thinking should be env