dhoran 10 samajik vignan pratham pariksha paper solution october 2021 _ Std 10 SS First Exam 2021

85% and 92% alcoholic solutions are mixed to get 35 litres of an 89% alcoholic solution.How many litres of each solution are there in the new mixture? a.10of the first and 25 of the second b.20 of the first and 15 of the second c.15 of the first and 20 of the second d.12of the first and 23 of the second

There are ten exams to be conducted from 9 to 13 of a month. There are two time slots for every day, morning slot and evening slot. The maximum marks of these exams are from 70 to 160. The maximum marks of every subject are unique. The time durations of the exams is from the range of 1hr to 5hr. The time duration is also unique for each subject. The subjects are Math, English, Physics, Bio, Chemistry, Economices, History, Home Science, Geography and Accounts. The first exam is of math and of 2hrs. The time duration of last exam is 15 minutes more than first exam. The exam of English is of 80 marks and on the same day of the exam of math. Total marks of the exams of first day are 180 marks. There are two exams between history and accounts. The last exam is of accounts and of 110 marks. There are three exams between English and the exam which is of 90 marks. The exam of physics is in morning and it is on an even date. The exam of 3hr and 5hr are on the same day. The sum of timings of math and physics is 5hr. The exam of 130 marks and 90 marks are on the same day. The exam of chemistry is not of 90 marks. The exam of geography is of 4^(1//2) hrs. and on the last day. The exam of home science is on an even date and of least marks. The exam of chemistry is before exam of economics. The exam of 150 marks is of maximum time duration. The exam of economics is of economics is of least time duration. The sum of time duration of economics and history is of 5hrs. The exam of Chemistry is of 3^(1//2) hrs. duration. The maximum marks of physics is 30 marks less than that of biology. The maximum marks of 4^(1//2) hrs. exam is 30 marks more than marks of accounts. History is of maximum marks. The maximum marks of home-science are least of all. Which two exams are scheduled for 10^(th) of the month?

The decompoistion of compound A in solution is a first order process with an activation energy of 52.3 kJ mol^(-1) . A 10% solution of A is 10% decomposed in 10 min at 10^(@)C . How much decompoistion would be observed with a 20% solution after 20 min at 20^(@)C .

A solution is found to contain [CI^(Theta)] = 1.5 xx 10^(-1)M, [Br^(Theta)] = 5.0 xx 10^(-4)M, [CrO_(4)^(2-)] = 1.9xx 10^(-2)M . A solution of AgNO_(3) (100 % dissociated) is added to the above solution drop by drop. Which silver salt will precipiate first ? Given: K_(sp) (AgCI) = 1.5 xx 10^(-10), K_(sp) (AgBr) = 5.0 xx 10^(-13),K_(sp) (Ag_(2)CrO_(4)) =1.9 xx 10^(-12) .

Wellness Co. Ltd. has issued 20,000, 9% Debentures of ₹ 100 each at a premium of 10% on 1^(st) April, 2018 redeemable as follows: 31^(st) March, 2021 – 10,000 debentures 31^(st) March, 2022 – 4,000 debentures 31^(st) March, 2023 – balance debentures. It transferred to Debentures Redemption Reserve the required amount as applicable rules of the Companies Act and Rules, 2014 on due date. How much amount will be transferred to General Reserve on 31st March, 2021 .

New Syllabus Of Class 10 Boards for 2021-22 Session

New Syllabus Of Class 10 Boards for 2021-22 Session