What is the simplest unit of repetition in a crystalline structure?

What is the simplest unit of repetition in a crystalline structure?
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ANSWER: A UNIT CELL
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Diamond is harder than graphite because of – (1) difference in layers of atoms (2) tetrahedral structure of diamond (3) difference of crystalline structures (4) None of these

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Last Answer : (1) difference in layers of atoms Explanation: Diamond is harder than graphite because diamond has a more complex structure. Diamond's structure is like many pentagons connected together, each pentagon ... together in some way. Graphite's structure is very loose, with its bonds forming layers.

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Last Answer : ANSWER: Z -- HAS A COMPLETELY REGULAR ATOMIC OR MOLECULAR STRUCTURE

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Description : What type of structure is this? a) sequence b) case c) repetition d) process

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Description : Which of the following is not a flowchart structure? a) Process b) Sequence c) Repetition d) Case

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Diamond does not conduct electricity, because - (1) It's structure is very compact (2) It is of crystalline nature (3) There are only carbon atoms present in it (4) No free electrons are present in it

Description : Diamond does not conduct electricity, because - (1) It's structure is very compact (2) It is of crystalline nature (3) There are only carbon atoms present in it (4) No free electrons are present in it

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Description : .Mad cow disease in cattle is caused by an organism which has (a) inert crystalline structure (b) abnormally folded protein (c) free RNA without protein coat (d) free DNA without protein coat.

Last Answer : (b) abnormally folded protein

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Description : Non-volatile heavy metals in kiln are fixed into ____ a) Clinker’s crystalline structure b) Fumes c) Solid lump d) Slag

Last Answer : Clinker’s crystalline structure

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Last Answer : No free electrons are present in it

An "International Unit" of penicillin activity established in 1944 is amount of penicillin equivalent to A.0.6 micrograms of crystalline penicillin G of about 98% purity B.0.6 micrograms of crystalline penicillin F of about 98% purity C.0.8 micrograms of crystalline penicillin G of about 98% purity D.0.8 micrograms of crystalline penicillin G of about 90% purity

Description : An "International Unit" of penicillin activity established in 1944 is amount of penicillin equivalent to A.0.6 micrograms of crystalline penicillin G of about 98% purity B.0.6 micrograms of crystalline ... G of about 98% purity D.0.8 micrograms of crystalline penicillin G of about 90% purity

Last Answer : A.0.6 micrograms of crystalline penicillin G of about 98% purity

What is the composition of crystalline water in blue vitriol ?

Description : What is the composition of crystalline water in blue vitriol ?

Last Answer : : Blue vitriol's crystal water content is 36.06%.

(4) Decomposition of manganese dioxide Explanation: One of the two chemical methods starts from natural manganese dioxide and converts it using dinitrogen tetroxide and water to manganese nitrate solution. Evaporation of the water leaves the crystalline nitrate salt. At temperatures of 400°C, the salt decomposes, releasing N2O4 and leaving a residue of purified manganese dioxide.

Description : (4) Decomposition of manganese dioxide Explanation: One of the two chemical methods starts from natural manganese dioxide and converts it using dinitrogen tetroxide and water to manganese nitrate ... 400°C, the salt decomposes, releasing N2O4 and leaving a residue of purified manganese dioxide.

Last Answer : The mass number of a nucleus is - (1) always less than its atomic number (2) the sum of the number of protons and neutrons present in the nucleus (3) always more than the atomic weight (4) a fraction

Diamond is the form of carbon that is - (1) Crystalline (2) Amorphous (3) Chemical (4) Alkaline

Description : Diamond is the form of carbon that is - (1) Crystalline (2) Amorphous (3) Chemical (4) Alkaline

Last Answer : (1) Crystalline Explanation: Diamond is a solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic.

Glass is - (1) Super cooled liquid (2) Crystalline solid (3) Liquid crystal (4) None of these

Description : Glass is - (1) Super cooled liquid (2) Crystalline solid (3) Liquid crystal (4) None of these

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Quartz is a crystalline form of - (1) Alumina (2) Glass (3) Silica (4) Limestone

Description : Quartz is a crystalline form of - (1) Alumina (2) Glass (3) Silica (4) Limestone

Last Answer : (3) Silica Explanation: Quartz is made up of a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall formula SiO2. Tridymite ... is a denser polymorph of quartz found in some meteorite impact sites and in metamorphic rocks.

Write the three crystalline forms in which Boron exist.

Description : Write the three crystalline forms in which Boron exist.

Last Answer : Ans.a) Prismatic Borax (Na2B4O7.10H2O) b) Octahedral Borax (Na2B4O7.5H2O) c) Anhydrous Sodium tetra borate (Na2B4O7

Predict the entropy change in- (i) A liquid crystallizes into solid (ii) Temperature of a crystalline solid raised from 0K to 115K.

Description : Predict the entropy change in- (i) A liquid crystallizes into solid (ii) Temperature of a crystalline solid raised from 0K to 115K.

Last Answer : Ans. (i) Entropy decreases because molecules attain an ordered state. (ii) Entropy increases because from 0K to 115K average kinetic of moleculesincreases.

Why are powdered substances more effective absorbents than their crystalline forms?

Description : Why are powdered substances more effective absorbents than their crystalline forms?

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Which of the following statements is False about acetamide? (a) reacts with Br2/NaOH to form tertiary amine (b) undergoes acid-hydrolysis to form acetic acid (c) undergoes dehydration with P2O5 to form a nitrile (d) is a white crystalline solid, soluble in water

Description : Which of the following statements is False about acetamide? (a) reacts with Br2/NaOH to form tertiary amine (b) undergoes acid-hydrolysis to form acetic acid (c) undergoes dehydration with P2O5 to form a nitrile (d) is a white crystalline solid, soluble in water

Last Answer : reacts with Br2/NaOH to form tertiary amine

Equivalent weight of crystalline oxalic acid is [MP PMT 1995] (A) 30 (B) 63 (C) 53 (D) 45

Description : Equivalent weight of crystalline oxalic acid is [MP PMT 1995] (A) 30 (B) 63 (C) 53 (D) 45

Last Answer : (B) 63

At temperatures above 96 degrees Celsius, which crystalline form of sulfur is the most stable?

Description : At temperatures above 96 degrees Celsius, which crystalline form of sulfur is the most stable?

Last Answer : ANSWER: MONOCLINIC

Forces in ionic crystalline solids are primarily which of the following? w)covalent x)electrostatic y)Van der Waals z)magnetic

Description : Forces in ionic crystalline solids are primarily which of the following? w)covalent x)electrostatic y)Van der Waals z)magnetic

Last Answer : ANSWER: X -- ELECTROSTATIC

Which of the following is NOT a physical property of crystalline boron? w) brown color x) diamond hardness y) brittleness z) high electrical resistance

Description : Which of the following is NOT a physical property of crystalline boron? w) brown color x) diamond hardness y) brittleness z) high electrical resistance 

Last Answer : ANSWER: W -- BROWN COLOR (Crystalline boron is transparent.) 

Quartz is a crystalline form of (1) Alumina (2) Glass (3) Silica (4) Limestone

Description : Quartz is a crystalline form of (1) Alumina (2) Glass (3) Silica (4) Limestone

Last Answer : Silica

A five digit number is formed by the digits 0, 1, 2, 3, 4 (without repetition). Find the probability that the number formed is divisible by 4 ? -Maths 9th

Description : A five digit number is formed by the digits 0, 1, 2, 3, 4 (without repetition). Find the probability that the number formed is divisible by 4 ? -Maths 9th

Last Answer : Without repetition, a five -digit number can be formed using the five digits in 5! ways (5 4 3 2 1) Out of these 5! numbers, 4! numbers will be starting with digit 0. (0 (fixed) 4 3 2 1) ∴ Total ... + 6 + 6 + 4 + 4 + 4 = 30∴ Required probability = \(rac{30}{96}\) = \(rac{5}{16}.\)

A four digit number is formed by the digits 1, 2, 3, 4 with no repetition. The probability that the number is odd is -Maths 9th

Description : A four digit number is formed by the digits 1, 2, 3, 4 with no repetition. The probability that the number is odd is -Maths 9th

Last Answer : (a) \(rac{1}{2}\) Let S be the sample spaceThen n(S) = Number of four digit numbers that can be formed with out repetition1 of 4 digits1 of 3 digits1 of 2 digits1 of 1 digitThHTO= 4! = 4 3 2 1 ways = 24 ways. Let E : ... 1 = 12∴ P(E) = \(rac{n(E)}{n(S)}\) = \(rac{12}{24}\) = \(rac{1}{2}\).

How many natural numbers not exceeding 4321 can be formed with the digits 1, 2, 3, 4 if repetition is allowed? -Maths 9th

Description : How many natural numbers not exceeding 4321 can be formed with the digits 1, 2, 3, 4 if repetition is allowed? -Maths 9th

Last Answer : answer:

What is pure repetition ?

Description : What is pure repetition ?

Last Answer : : A decimal fraction is called a pure repetition if there is no number other than the decimal point after the decimal point .

What is an example of Repetition in 'The Scarlet Ibis'?

Description : What is an example of Repetition in 'The Scarlet Ibis'?

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What is the answer for the number of 3 letter words with or without meaning that can be formed out of the letters of the word LOGARITHMS if repetition of the letters is not allowed?

Description : What is the answer for the number of 3 letter words with or without meaning that can be formed out of the letters of the word LOGARITHMS if repetition of the letters is not allowed?

Last Answer : It is 720.

What is the answer for the number of 3 letter words with or without meaning that can be formed out of the letters of the word LOGARITHMS if repetition of the letters is not allowed?

Description : What is the answer for the number of 3 letter words with or without meaning that can be formed out of the letters of the word LOGARITHMS if repetition of the letters is not allowed?

Last Answer : It is 720.

What effect the repetition on the lines brennan on the moor brennan on the moor bold and undaunted stood young brennan on the moor has on the meaning of the poem?

Description : What effect the repetition on the lines brennan on the moor brennan on the moor bold and undaunted stood young brennan on the moor has on the meaning of the poem?

Last Answer : The line "Brennan on the moor/Brennan on the moor/bold and undaunted stood young Brennan on the moor" is repeated in the opening and closing stanzas to remind the reader of the man's name as we begin and end his tragic tale in this epic-style poem.

which best explains the use of repetition in "sestina of the tramp royal"?

Description : which best explains the use of repetition in "sestina of the tramp royal"?

Last Answer : end words are repeated several times

Which is the proper measurement of average power emitted by a pulsed laser? a. Energy x time b. Pulse energy x repetition rate c. Pulse energy / repetition rate d. Peak power x pulse length

Description : Which is the proper measurement of average power emitted by a pulsed laser? a. Energy x time b. Pulse energy x repetition rate c. Pulse energy / repetition rate d. Peak power x pulse length

Last Answer : b. Pulse energy x repetition rate

What do you call the perceptible sound repetition? A. Reverberation B. Echo C. Reflection D. Masking

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The periodicity of repetition of properties in Newland’s law was

Description : The periodicity of repetition of properties in Newland’s law was

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The repetition of property after a certain interval called ------? A. Electron efinity B. Atomic radius C. periodicity of property (Answer) D. none of these

Description : The repetition of property after a certain interval called ------? A. Electron efinity B. Atomic radius C. periodicity of property (Answer) D. none of these

Last Answer : C. periodicity of property (Answer)

Iteration also called: a. Repetition b. Straight c. Selection d. Sequence

Description : Iteration also called: a. Repetition b. Straight c. Selection d. Sequence

Last Answer : a. Repetition

_is sequence of instructions is executed and repeated any no. of times in loop until logical condition is true: a. Iteration b. Repetition c Botha&b d. None of these

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The poet has repeated some words in the poem like ̳velvet quiet‘ and ̳quiet rage‘. The effect of this repetition is ___________. (a) to increase the intensity of tiger‘s rage and helpless silence. (b) to make the poem rhyming. (c) to show the calm nature of tiger. (d) to describe his beauty.

Description : The poet has repeated some words in the poem like ̳velvet quiet‘ and ̳quiet rage‘. The effect of this repetition is ___________. (a) to increase the intensity of tiger‘s rage and helpless silence. (b) to make the poem rhyming. (c) to show the calm nature of tiger. (d) to describe his beauty.

Last Answer : (a) to increase the intensity of tiger‘s rage and helpless silence.

Using which method in transport layer data integrity can be ensured? a. Checksum b. Repetition codes c. Cyclic redundancy checks d. Error correcting codes

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You have to observe an included angle with better accuracy than what is achievable by a vernier, you will prefer the method of (A) Repetition (B) Reiteration (C) Double observations (D) Exactness

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Last Answer : (A) Repetition 

In an astable multivibrator, which components determine the pulse repetition frequency?

Description : In an astable multivibrator, which components determine the pulse repetition frequency?

Last Answer : RC coupling networks.

Why do 2D air-search radars use relatively low carrier frequencies and low pulse-repetition rates?

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Last Answer : Increased maximum range.

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Description : What term is used to describe the product of pulse width and pulse-repetition frequency?

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