Saved Bookmarks
This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is volume???????? |
|
Answer» Answer: Volume is the QUANTITY of three-dimensional space enclosed by a closed surface, for example, the space that a substance or shape occupies or contains. Volume is often QUANTIFIED numerically USING the SI derived unit, the cubic metre. Explanation: hope it HELPS you mark me brainliest |
|
| 2. |
9. Give two tests for detection of presence of aldehyde in given sample. |
|
Answer» Answer: 9. GIVE two tests for DETECTION of PRESENCE of ALDEHYDE in given sample. Explanation: |
|
| 3. |
...........is weak acid but ................... is strong acid. |
|
Answer» Strong acid ----> H2SO4/HCl |
|
| 4. |
What is chloride?????? |
|
Answer» The chloride ion is the anion Cl⁻. It is formed when the ELEMENT chlorine gains an electron or when a compound such as HYDROGEN chloride is dissolved in WATER or other polar solvents. Chloride salts such as sodium chloride are OFTEN very soluble in water. |
|
| 5. |
You are given withCopper fillingsWaterSolid Silver BromideSilver nitrate solutionQuick limeSolid Ferrous SulphateMake any three balanced equations for the reactions that cantake place using some or all of these materials. |
| Answer» | |
| 6. |
The value of k reaction is 3.36*10^24-1S,order of reaction is |
|
Answer» (i) Rate of the reaction is GIVEN by, Rate=k×[A] , where x is the order of reaction ( L mol )=2.3×10 −5 L(mol −1 )(s) −1 [A] x
( L mol ) 2 =constant(s −1 )[ L mol ] x
Therefore, x=2 and the reaction is second order (ii)Rate=k×[A] x , where x is the order of reaction ( L mol )=3×10 −4 (s) −1 [A] x
( L mol )=constant(s −1 )[ L mol ] x
Therefore, x=1 and reaction is first order Explanation: |
|
| 7. |
Out of Li, Be, Mg. AI, P and Cl which have completely filled and half-filled orbitals consequentlylarge ionisation enthalpies1+1= (2) |
|
Answer» li,AL,p,CL these have half FILLED orbitals be,mg these have fully filled orbitals |
|
| 9. |
பாபர் மஸ்ஜித் கட்டப்பட்ட ஹிஜிரி ஆண்டு? |
|
Answer» I can't UNDERSTAND your LANGUAGE. |
|
| 10. |
Q1.When was the platinum jubilee of RIMC celebratedआर.आई.एस.सी. को प्लेटिनम जुबली कब मनायी गयी?(a) 1995(b) 1996(c)1994(d) None of these |
|
Answer» NONE of these Answer: On 13th March 1997, the RIMC celebrated its Platinum JUBILEE. |
|
| 11. |
कोयले की खदानों में काम करने वाले लोग जैसे मास्क में सक्रिय चारकोल का उपयोग क्यों करते chemistry class 12th |
|
Answer» ANSWER: क्योंकि चारकोल हवा को शुद्ध रखने में काफी मददगार है जिसके कारण लोग कोयले के कारखाने में चारकोल से बने सामानों का अधिक उपयोग करते हैं |
|
| 12. |
how is an equilibrium expression related to the equation for the chemical reaction that comes to equilibrium? |
|
Answer» Answer: In the equilibrium constant expression, the concentrations of the products go in the numerator and the concentrations of the reactants go the denominator. The equilibrium constant is derived from the rate laws for the forward and reverse REACTIONS. ... Reactants and products that exist as SOLIDS and liquids are omitted. Explanation: HII PLEASE FOLLOW ME PLEASE FOLLOW ME AND THANKS MY ANSWER AND BRAINLEST MY ANSWER PLEASE THIS IS THE CORRECT ANSWER OKK PLZZ FOLLOW ME AND THANKS MY ANSWERS AND BRAINLEST MY ANSWER |
|
| 13. |
In k2 [cu(c2o4)2 ].2h2o why h20 molecule is written outside the bracket? |
|
Answer» Explanation: The chemistry of coordination COMPOUNDS ... the cobalt ion during the REACTION and (ii) the compounds are formulated as SHOWN ... The ionisable groups are written outside the BRACKET and... Hope it HELPS u... |
|
| 14. |
Calculate the pressure of gas , when its volume is 250ml initially , the gas is expanded to volume of 100ml and the pressure of 0.4 atmosphere . the temperature during the reaction remains constant . |
|
Answer» + 100 +0.4 ANSWER =354 |
|
| 15. |
9) What is the function of phenolphthalein used in neutralisationreaction ?A. As an acidB. As a baseC. As a saltD. As an indicatorfast give me the answer |
Answer» C is the CORRECT ANSWER |
|
| 16. |
Describe the policy adopted by load Dalhousie to expand the British empire in India |
|
Answer» Answer: Doctrine of lapse was the pro-imperialist approach to expand the realm of British Kingdom in India. It was INTRODUCED by Dalhousie. The Doctrine equipped with an idea to annex those STATES which have no HEIR, GET lapsed the right of ruling and it will not reverted by adoption.
|
|
| 17. |
Correct Electronic configuration of “Cu” with atomic number 29 is |
|
Answer» Answer: DUE to EXTRA stability of half filled and full filled orbital, CU have CONFIGURATION 1s22s22p63s23p63d104s14p0 Explanation: Finally the Answer Is Here |
|
| 18. |
Why the nobel gas have highest value of ionisation enthalpies in there respective period |
| Answer» | |
| 20. |
2. The components of water can be separated by(a) Physical methods (b) Chemical methods (c) Both (d) They can be separate |
|
Answer» By CHEMICAL meathod Explanation: |
|
| 21. |
5.2.5 Formal charge |
|
Answer» Answer:u can FIND ur ans by following methord Explanation: The formal charge of an atom in a molecule is the hypothetical charge the atom WOULD have if we COULD redistribute the electrons in the bonds evenly between the atoms. Another way of saying this is that formal charge results when we TAKE the number of valence electrons of a NEUTRAL atom, subtract the nonbonding electrons, and then subtract the number of bonds connected to that atom in the Lewis structure. Thus, we calculate formal charge as follows: formal charge = # valence shell electrons (free atom) − # lone pair electrons − 1 2 # bonding electrons |
|
| 22. |
What is salt bridge plz describe ? give its two function |
Answer» Hi Friends !!Here is UR Answer !! Answer:Salt Bridge: A salt bridge is a U- shape containing concentrated solution of an inert electrolyte LIKE KCl, KNO3, K2SO4 etc. or a solidified solution of those electrolytes in agar-agar solution and gelatin. These inert electrolytes do not take part in redox reaction of the cell and even don't react with the electrolyte used. Function: the main functions of a salt bridge are; They allow the movement of ions from one solution to another without mixing of the two solutions and complete the electrical circuit. To maintain the electical neutrality of the solutions in the two HALF cells. Hope it will be help u and don't forget to mark me as Brainliest and Thanks to my Answers also........(●'◡'●) |
|
| 23. |
Questions in photoPlease give answer |
|
Answer» ............,..................... |
|
| 24. |
Javelin throw is an example for which type of motion |
|
Answer» PROJECTILE MOTION is the ANSWER |
|
| 25. |
One molar Solution of H2SO4 is equal to : |
|
Answer» As H2SO4 is DIBASIC, its basicity is 2. So molar solution of H2SO4 is equal to 2N. |
|
| 26. |
What is a resource??????? |
|
Answer» A Resource is something that can be USED for a PURPOSE. For EXAMPLE, tools are RESOURCES.
|
|
| 27. |
State Raoutl's law for a solution containing non-volatile solute dissolved in volatile solvent |
|
Answer» Raoutl's LAW for non- volatile solute Raoult's law STATES that the relative lowering of VAPOUR pressure of a solution containing a non- volatile solute is EQUAL to the mole fraction of the solute in the solution. |
|
| 28. |
Plz solve this questiondon't spam it |
|
Answer» okokokokokokokokok Explanation: okokokokokokokokokok |
|
| 29. |
13. एल्काइल ऐमीन अमोनिया से प्रबल क्षार है, क्यो |
|
Answer» ऐलिफैटिक ऐमीन, नाइट्रोजन परमाणु पर ऐल्किल समूहों के +I प्रभाव के कारण अधिक इलेक्ट्रॉन घनत्व होने से अमोनिया से प्रबल क्षारक होते हैं। इनके PK, मान 3 से 4.22 के मध्य होते हैं। |
|
| 30. |
9.7 The Oxidation number of Mn in KMnO, is +7 True or False0.8 Write the conjugate acid of Sox ton3 3 3 30.9 Molarity of pure water is>>>Q.10 What type of hybridisation present in NH molecule?9.11 What is the difference between gas and vapours?(2)012" The lonisation enthalpy also depends upon the electronic configuration of the atom It has beenobserved that certain electronic configurations are more stable than others. For example hof files andcompletely filled shell have extra stability associated with them. Consequently it is difficult to removeelectron from these stable configurations,Answer the following on the basis of the above paragraphWhy the noble gases have highest value of ionisation enthalples in their respective period ?Out of u, Be, Mg, Al, P and Cl which have completely filled and half-filled orbitals consequentlylarge ionisation enthalples1+12)Q.13 What is Salt bridge? Give its two functions orWrite a short note on standard hydrogen electrode with figure.Q.14 Classily any four the following into intensive properties and extensive properties.Density, Enthalpy, Surface tension, Number of moles, viscosity, volume, Colour, EntropyQ15* The change in pressure has also an important effect on equilibrium which involve gaseous substancesand there is change in total number of moles of gases in reactants and products. If the pressure of thegaseous system is increased the volume occupied by the system will decrease and the equilibrium will shifttowards that direction in which there are fesser no of moles of gaseous substances.Answer the following on the basis of the above paragraph:(0)According to which principle there is shift in the equilibrium of gaseous system if pressure isIncreasedIf pressure is increased in which direction the equilibrium will shift in the following reactionN2(g) + 3H2(g)2NHxg)Q. 16 (a) Write the resonating structures of 50%(b) Which one of the following species is diamagnetic. 0, 0, 0, 0);or |
|
Answer» vivivgiccicuv vononob |
|
| 31. |
What type of hybridisation present in nh3 molecule? |
|
Answer» In AMMONIA (NH3) or to be more precise the central atom in ammonia which is NITROGEN is sp3 hybridized. Explanation: please mark as BRILLIANT |
|
| 32. |
Oxygen is gas and sulphur is solid why |
|
Answer» Answer: HD DVD player and the XBOX one will have the most fun in a world of MUSIC streaming and TV and television and music is available on Amazon or Netflix on Netflix for a number on time or other time but it's also not worth a moves or SOMETHING that the world has a moves LIKE that are the most popular in a 666666inches market and it has a huge amount in it at least in a way that's a lot more than |
|
| 34. |
Zinc Zn which group of element |
|
Answer» Answer: pls MARK brinlist Explanation: Zinc GROUP element, any of the four CHEMICAL elements that constitute Group 12 (IIb) of the PERIODIC table—namely, zinc (Zn), cadmium (Cd), mercury (HG), and copernicium (Cn). |
|
| 35. |
.All questions are compulsory, however internal choices have been given.Qi One molar Solution of HzSO, is equal to -(a) IN Solution(b) N/2 Solution(c) 2N Solution(d) 3N Solution(1)Q.2 Correct Electronic configuration of "Cu" with atomic number 29 is(a) [Ar]3d1045(b) [Ar]3d 4s?(c) [Ar]30*45*40*(d) None of these(1)Q.3 Which of the following has the smallest size?(a) Na(b) Na(c) Na(d) c1*1)Q4 Which one of the following is the weakest?(a) tonic Bond(b) Covalent Bond(c) Metallic Bond(d) van der Waals' forces(1)Qs Compressibility factor for a gas under critical is:(a) 3/8(b) 1/8(c) 1{dj2(1)0.6 A Reaction occurs spontaneously if:(al TASCAH and both &H and AS are +ve(b) TASSand RH in +ve. As is ve(c) TAS> H and both QH and TAS are ve(d) TAS=AH and both AH and TAS are tve(1) |
|
Answer» Answer: 1 a. in solution 2a.cone I am new to BRAIN LY please. follow me or mark as brain least |
|
| 36. |
Write the conjucate of so4^2 ion |
|
Answer» Answer: The conjugate ACID of sulphate(SO42−) is HYDROGEN sulphate(HSO42−) Explanation: PLS MARK AS BRAINLIEST |
|
| 37. |
(b) Write the reactions to show the dualnature of the amphoteric oxide. |
|
Answer» xbdbdhshshjsjwjshxisiwiiwjwjwhwjwhsjs ndndjdjsjusehhdhdhdhdhhx ndjdjdjd |
|
| 38. |
Bengaluru is cooler than chennai.........change the degree of addictive without change meaning.. |
| Answer» | |
| 39. |
How to make liquid oxygen |
|
Answer» Explanation: The USUAL way to do this is to pass oxygen GAS from a compressed gas cylinder through a COIL of hollow copper pipe which is submerged in liquid nitrogen. The copper coil is a good CONDUCTOR of heat and has a LARGE surface area. Liquid oxygen is then usually collected in a thermos flask. |
|
| 40. |
Peline the following terms-(a) mole(6) Limiting reagent t(c) Atomic mass unit |
|
Answer» Answer: a...The mole is the unit of measurement for amount of SUBSTANCE in the International SYSTEM of Units. b...The limiting reagent (or limiting REACTANT or limiting agent) in a CHEMICAL reaction is a reactant that is totally consumed when the chemical reaction is completed c...The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass unit (amu, also KNOWN as daltons, D). |
|
| 41. |
Write oxidation state of chromium and cobalt in this two compounds |
|
Answer» I) Let, X be the OXIDATION number of Cr in [Cr(NH3)6]
Now, x+6×(0)+3×(−1)=0 x−3=0 ⇒x=+3. Oxidation number of Cr is =+3 ii) Let x be the oxidation state of Co in [Co(CN)6]. Since the OVERALL charge on the complex is −3, the sum of oxidation states of all elements in it should be EQUAL to −3. Therefore, x+6(−1)=−3 or, x=+3. xxxxxxxxxxxxxxxxxxxxxx |
|
| 42. |
7. In which of the following primitive unit cell have a=b=C;a) Triclinicb) Monoclinic c) Hexagonald) Cube8. |
| Answer» | |
| 43. |
explain the following terms: 1) system 2) surroundings 3) standard enthalpy of formation 4) entropy 5) hess's law |
|
Answer» Answer: ★ disadvantage of wind ENERGY.
The two major disadvantages of wind power include initial cost and technology immaturity. FIRSTLY, CONSTRUCTING turbines and wind facilities is EXTREMELY expensive. The second disadvantage is technology immaturity. |
|
| 44. |
. Give any three examples of chemical changes that occur in the laboratory with their wordequations. |
|
Answer» i don't KNOW sorry Explanation: |
|
| 45. |
The oxydation number of mn in KMno4 is +7. true or false |
|
Answer» ANSWERS is true it is ture true is answers |
|
| 46. |
Correct Electronic configuration of “Cu” with atomic number 29 is(a) [Ar]3d104s1 (b) [Ar]3d94s2 (c) [Ar]3d54s24p4 (d) None of these |
|
Answer» Explanation: DUE to extra stability of HALF FILLED and full filled orbital, Cu have CONFIGURATION 1s22s22p63s23p63d104s14p0. |
|
| 47. |
Compressibillity factor for a gas under critical is. 3/8, 1/8,1,2 |
|
Answer» Answer: 3/8 Explanation: MARK me as BRAINLIEST |
|
| 48. |
What are the characteristics of Mendeleev’s Periodic table? and List two observations which posed a challenge to Mendeleev’s Periodic table. |
|
Answer» Answer: EXPLANATION:Mendeleev ARRANGED the elements on the basis of their atomic mass. Melting and boiling point were USED as the physical characteristics in deciding the position of elements. He arranged the elements and wrote the formula of their oxides and HYDRIDES which seemed to possess same chemical formula. |
|
| 49. |
What happens, when n-butyl chloride treated with alcoholic KOH? |
|
Answer» |
|
| 50. |
Can anyone please tell the type of isomerism shown by these 2 organic molecules |
|
Answer» Answer: Isomers can be split into two broad groups – structural (or CONSTITUTIONAL) isomers, and stereoisomers. We’ll consider structural isomers first, which can be split again into three main subgroups: chain isomers, position isomers, and FUNCTIONAL group isomers. Structural ISOMERISM can quickly get quite out of HAND in terms of the number of possible isomers; butane (four CARBONS) has two possible isomers, decane (ten carbons) has seventy-five, and a simple hydrocarbon containing 40 carbon atoms has an estimated 62,000,000,000 structural isomers. Explanation: I hope it'll help you |
|