Lanthanoids and actinoids are placed in separate rows at the bottom of the periodic table. Explain the reason for this arrangement.

Question

ALOK_RAJ Asked Sep 5, 2023

92 views

1 Answer

RELATED DOUBTS

ANAND_YADAV Asked Jul 30, 2023

59 views

A small boat carrying loads does not sink in the river, at the same time an iron pillar of same weight sinks into the river. The reason for this is_____.

ANAND_YADAV Asked Jul 30, 2023

by ANAND_YADAV

1 Answer

0 Votes

59 Views

Aayush Asked Mar 1

45 views

Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escapes in the time required for one-half of the hydrogen to escape?

Aayush Asked Mar 1

by Aayush

1 Answer

0 Votes

45 Views

ANAND_YADAV Asked Jul 26, 2023

26 views

Two equal and opposite charges $4×10^{-8}C$ are placed $2×10^{-2}$ cm away, from a dipole. If this dipole is placed in an external electric field of $4×10^8NC^{-1}$

ANAND_YADAV Asked Jul 26, 2023

by ANAND_YADAV

1 Answer

0 Votes

26 Views

ALOK_RAJ Asked Sep 5, 2023

89 views

What is the basis of classifying the elements in the modern periodic table?

ALOK_RAJ Asked Sep 5, 2023

by ALOK_RAJ

1 Answer

0 Votes

89 Views

ANAND_YADAV Asked Aug 7, 2023

65 views

For the non-stoichiometric reaction : $2 A+B \rightarrow C+D$, the following kinetic data were obtained in three separate experiments, all at $298 {~K}$.

ANAND_YADAV Asked Aug 7, 2023

by ANAND_YADAV

1 Answer

0 Votes

65 Views

Shakti Asked Dec 20, 2021

269 views

Sulphur exist in different allotropic forms like S2, S6 and S8 etc. If equal moles of these three forms are taken in separate containers, then the ratio of number of atoms present in them respectively is

Shakti Asked Dec 20, 2021

by Shakti

1 Answer

5 Votes

269 Views

ALOK_RAJ Asked Nov 28, 2023

195 views

Colourless solutions of the following four salts are placed separately in four different test tubes and a strip of copper is dipped in each one of these. Which solution will turn blue?

ALOK_RAJ Asked Nov 28, 2023

by ALOK_RAJ

1 Answer

1 Vote

195 Views

Chandan Asked Sep 11, 2023

55 views

In a reaction A (g) + 2 B (g) $\rightleftharpoons$ 2 C (g), 2 moles of ' $A ^{\prime}, 3$ moles of 'B' and 1 mole of 'C' are placed in a 2 L flask and the equilibrium concentration of 'C' is 1 mol / L.

Chandan Asked Sep 11, 2023

by Chandan

1 Answer

0 Votes

55 Views

Chandan Asked Sep 13, 2023

112 views

Which element in periodic table has highest ionization energy (IE)?

Chandan Asked Sep 13, 2023

by Chandan

1 Answer

0 Votes

112 Views

ANAND_YADAV Asked Aug 2, 2023

129 views

A man goes at the top of a smooth inclined plane. He releases a bag to fall freely and himself slides down on inclined plane to reach the bottom.

ANAND_YADAV Asked Aug 2, 2023

by ANAND_YADAV

1 Answer

0 Votes

129 Views

Aayush Asked Jan 2

37 views

A column which is uniquely identifies the rows of a table is called a

Aayush Asked Jan 2

by Aayush

1 Answer

0 Votes

37 Views

Dev Yaduvanshi Asked Aug 12, 2023

64 views

How many characters are there in the story? Whom do you like most? Give reason for your choice.

Dev Yaduvanshi Asked Aug 12, 2023

by Dev Yaduvanshi

1 Answer

0 Votes

64 Views

Chandan Asked Oct 7, 2023

134 views

Hydrogen and oxygen are known to form two componds. The hydrogen contents of the two compounds are 42.9% and 27.3% respectively, Show that this data is in agreement with law of multiple proportions.

Chandan Asked Oct 7, 2023

by Chandan

2 Answers

0 Votes

134 Views

Aayush Asked Feb 2

70 views

0.05 mole of LiAIH4 in ether solution was placed in a flask containing 74g (1 mole) of t-butyl alcohol. The product LiAIHC12H27O3 weighed 12.7 g. If Li atoms are conserved, the percentage yield is —

Aayush Asked Feb 2

by Aayush

1 Answer

0 Votes

70 Views

Aayush Asked Feb 7

39 views

How much volume of oxygen will be required for complete combustion of 40L of acetylene (C2H2) and how much volume of carbon dioxide will be formed. All volumes are measured at STP

Aayush Asked Feb 7

by Aayush

1 Answer

0 Votes

39 Views

ALOK_RAJ Asked Aug 26, 2023

155 views

In the following reaction, 3A(g) + B(g) ⇌ 2C(g) + D(g), Initial moles of B is double of A. At equilibrium, moles of A and C are equal. Hence % dissociation of B is :

ALOK_RAJ Asked Aug 26, 2023

by ALOK_RAJ

1 Answer

0 Votes

155 Views

Chandan Asked Aug 9, 2023

197 views

Equal masses of sulphur dioxide and oxygen are mixed in an empty container at $25^{\circ} C$. The fraction of the total pressure exerted by sulphur dioxide is :

Chandan Asked Aug 9, 2023

by Chandan

1 Answer

0 Votes

197 Views

Chandan Asked Aug 9, 2023

164 views

50g of H2 is placed in a vessel of constant volume and temperature. A hole is punctured in the vessel and left in vacuum. The pressure of H2 in the vessel will vary with time as

Chandan Asked Aug 9, 2023

by Chandan

1 Answer

0 Votes

164 Views

ANAND_YADAV Asked Aug 2, 2023

103 views

The displacement 'x' and time of travel 't' for a particle moving an a straight line are related as $t=$ $\sqrt{(x+1)(x-1)}$. Its acceleration at a time $t$ is

ANAND_YADAV Asked Aug 2, 2023

by ANAND_YADAV

1 Answer

0 Votes

103 Views

Ankit Asked Oct 6, 2023

72 views

What discrepancies were there Mendeleev periodic table?

Ankit Asked Oct 6, 2023

by Ankit

1 Answer

0 Votes

72 Views

ALOK_RAJ Asked Aug 3, 2023

145 views

The wavelengths and frequency of radiation of photons in transitions 1, 2 and 3 for hydrogen like atom are $\lambda_{1}, \lambda_{2}, \lambda_{3}$ and $v_{1}, v_{2}, v_{3}$ respectively.

ALOK_RAJ Asked Aug 3, 2023

by ALOK_RAJ

1 Answer

1 Vote

145 Views

Ravi Singh Asked Jun 4, 2022

68 views

आधुनिक आवर्त सारणी में तत्वों को विन्यासित किया गया है? Aadhunik Avart Sarni Mein Tatvon Ko Vinyasit Kiya Gaya Hai?

Ravi Singh Asked Jun 4, 2022

by Ravi Singh

1 Answer

2 Votes

68 Views

Rishav Raj Asked Mar 25, 2022

90 views

आवर्त सारणी का आविष्कार किस वैज्ञानिक द्वारा किया गया था? Avart Sarni Ka Aavishkar Kis Vaigyanik Dwara Kiya Gaya Tha?

Rishav Raj Asked Mar 25, 2022

by Rishav Raj

1 Answer

5 Votes

90 Views

Rishav Raj Asked Jan 5, 2022

34 views

___________ ने तत्वों को उनके बढ़ते हुए परमाणु भार के क्रम में सजाया था। ____________ Tatvon Ko Unke Badhate Hue Parmanu Bhar Ke Kram Mein Sajaya Tha.

Rishav Raj Asked Jan 5, 2022

by Rishav Raj

1 Answer

5 Votes

34 Views

Rishav Raj Asked Jan 5, 2022

67 views

तत्वों को उनके गुणधर्मों में समानता के आधार पर _____________ में सजाया गया है। Tatvon Ko Unke Gundharmon Mein Samanta Ke Aadhar Par _____________ Mein Sajaya Gaya Hai.

Rishav Raj Asked Jan 5, 2022

by Rishav Raj

1 Answer

5 Votes

67 Views

ALOK_RAJ Asked Oct 16, 2021

99 views

आधुनिक आवर्त सारणी द्वारा किस प्रकार के मेंडलीफ आवर्त सारणी की विविध विसंगतियों को दूर किया गया?

ALOK_RAJ Asked Oct 16, 2021

by ALOK_RAJ

1 Answer

3 Votes

99 Views

Chandan Asked Oct 15, 2021

181 views

मेंडलीफ ने अपनी आवर्त सारणी तैयार करने के लिए कौन-सा मापदंड अपनाया? Mendeleef Ne Apni Avart Sarni Taiyar Karne Ke Liye Kaun Sa Maapdand Apnaya?

Chandan Asked Oct 15, 2021

by Chandan

1 Answer

5 Votes

181 Views

ALOK_RAJ Asked Oct 12, 2021

502 views

मेंडलीफ के आवर्त सारणी के विसंगतियों को लिखें। Mendeleef Ke Avart Sarni Ke Visangatiyo Ko Likhen

ALOK_RAJ Asked Oct 12, 2021

by ALOK_RAJ

1 Answer

5 Votes

502 Views

ALOK_RAJ Asked Sep 7, 2021

142 views

आधुनिक आवर्त सारणी और मेंडलीफ की आवर्त सारणी में तत्वों की व्यवस्था की तुलना करें।

ALOK_RAJ Asked Sep 7, 2021

by ALOK_RAJ

1 Answer

4 Votes

142 Views

ALOK_RAJ Asked Sep 6, 2021

172 views

आवर्त सारणी के शून्य समूह का तत्व है? Avart Sarni Ke Sunya Samuh Ka Tatva Hai?

ALOK_RAJ Asked Sep 6, 2021

by ALOK_RAJ

0 Answers

4 Votes

172 Views

ALOK_RAJ Asked Jun 9, 2021

237 views

आवर्त सारणी में कितने आवर्त हैं? Aavart Saarni Me Kitne Aavart Hai?

ALOK_RAJ Asked Jun 9, 2021

by ALOK_RAJ

1 Answer

7 Votes

237 Views

ALOK_RAJ Asked Apr 24, 2022

141 views

In which of the following options the order of arrangement does not agree with the variation of property indicated against it?

ALOK_RAJ Asked Apr 24, 2022

by ALOK_RAJ

1 Answer

5 Votes

141 Views

ANAND_YADAV Asked Aug 8, 2023

141 views

One litre of O2 and one litre of H2 are taken in a vessel of 2-litre capacity at STP.

ANAND_YADAV Asked Aug 8, 2023

by ANAND_YADAV

1 Answer

0 Votes

141 Views

ALOK_RAJ Asked Aug 26, 2023

34 views

For the reaction $A(g)+B(g) \rightleftharpoons C(g)$ at equilibrium, the partial pressure of the species are $P_{A}=0.15$ atm, $P_{C}=P_{B}=0.30$ atm.

ALOK_RAJ Asked Aug 26, 2023

by ALOK_RAJ

1 Answer

0 Votes

34 Views

ALOK_RAJ Asked Aug 4, 2023

63 views

For the equilibrium $PCl _{5}( g ) \rightleftharpoons PCl _{3}( g )+ Cl _{2}( g )$ in a closed vessel, $K _{ p }$ is found to be double of $K _{ c }$. This is attained when:

ALOK_RAJ Asked Aug 4, 2023

by ALOK_RAJ

1 Answer

0 Votes

63 Views

ASK DOUBTS

Lanthanoids and actinoids are placed in separate rows at the bottom of the periodic table. Explain the reason for this arrangement.

0 Comments

Please log in or register to add a comment.

Please log in or register to answer this question.

1 Answer

0 Comments

Please log in or register to add a comment.

RELATED DOUBTS

CATEGORIES

POPULAR TAGS